diff --git a/lib/array_list.c b/lib/array_list.c
index a5b03fb..c475cda 100644
--- a/lib/array_list.c
+++ b/lib/array_list.c
@@ -2,7 +2,15 @@
 
 struct array_list* array_list_initialization() {
   struct array_list* list = malloc(sizeof(struct array_list));
+  if (list == NULL) {
+    perror("Error (array_list_initialization)");
+    exit(EXIT_FAILURE);
+  }
   list->data = malloc(sizeof(void*) * ARRAY_LIST_INITIAL_CAPACITY);
+  if (list->data == NULL) {
+    perror("Error (array_list_initialization)");
+    exit(EXIT_FAILURE);
+  }
   list->size = 0;
   list->capacity = ARRAY_LIST_INITIAL_CAPACITY;
   return list;
@@ -13,6 +21,10 @@ void array_list_add(struct array_list* list, void* element) {
     size_t previous_capacity = list->capacity;
     list->capacity += ARRAY_LIST_INITIAL_CAPACITY;
     list->data = realloc(list->data, sizeof(void*) * list->capacity);
+    if (list->data == NULL) {
+      perror("Error (array_list_add)");
+      exit(EXIT_FAILURE);
+    }
     for (size_t index = previous_capacity; index < list->capacity; index++) {
       list->data[index] = NULL;
     }
diff --git a/lib/array_list.h b/lib/array_list.h
index c9717c7..1a183a3 100644
--- a/lib/array_list.h
+++ b/lib/array_list.h
@@ -3,6 +3,7 @@
 
 #include <errno.h>
 #include <stdbool.h>
+#include <stdio.h>
 #include <stdlib.h>
 
 #include "types.h"
diff --git a/lib/character.c b/lib/character.c
index 737f917..1066c9a 100644
--- a/lib/character.c
+++ b/lib/character.c
@@ -32,9 +32,9 @@ bool character_get_is_digit(const char character) {
   return character >= '0' && character <= '9';
 }
 
-unsigned char character_get_alphabet_position(const char character) {
+uint8_t character_get_alphabet_position(const char character) {
   const char letter = character_to_lower(character);
-  unsigned char position = 0;
+  uint8_t position = 0;
   if (letter >= 'a' && letter <= 'z') {
     position = (letter - 'a') + 1;
   }
diff --git a/lib/character.h b/lib/character.h
index afb3a84..f1f7374 100644
--- a/lib/character.h
+++ b/lib/character.h
@@ -59,9 +59,9 @@ bool character_get_is_digit(const char character);
  * Return 0 if the character is not a letter.
  *
  * @param character
- * @return unsigned char
+ * @return uint8_t
  * @since v1.0.0
  */
-unsigned char character_get_alphabet_position(const char character);
+uint8_t character_get_alphabet_position(const char character);
 
 #endif
diff --git a/lib/convert.c b/lib/convert.c
index 20d995b..db3e85b 100644
--- a/lib/convert.c
+++ b/lib/convert.c
@@ -19,9 +19,9 @@ char convert_digit_to_character(const char digit) {
   return digit + '0';
 }
 
-long long convert_string_to_number(const string_t string) {
+int64_t convert_string_to_number(const string_t string) {
   bool is_negative = string[0] == '-';
-  long long integer = 0;
+  int64_t integer = 0;
   size_t length = string_get_length(string);
   for (size_t index = is_negative ? 1 : 0; index < length; index++) {
     integer = integer * 10 + convert_character_to_digit(string[index]);
@@ -29,13 +29,13 @@ long long convert_string_to_number(const string_t string) {
   return is_negative ? integer * -1 : integer;
 }
 
-string_t convert_number_to_string(const long long integer) {
+string_t convert_number_to_string(const int64_t integer) {
   if (integer == 0) {
     return convert_character_to_string('0');
   }
   bool is_negative = integer < 0;
   size_t length = 1;
-  long long current = mathematics_absolute_value(integer);
+  int64_t current = mathematics_absolute_value(integer);
   while (current != 0) {
     current = current / 10;
     length++;
@@ -62,21 +62,21 @@ string_t convert_number_to_string(const long long integer) {
   return string;
 }
 
-string_t convert_number_from_base_10_to_base(unsigned long long number, unsigned long base) {
+string_t convert_number_from_base_10_to_base(uint64_t number, uint64_t base) {
   if (number == 0) {
     return "0";
   }
-  int remainders[64];
-  int index = 0;
+  int64_t remainders[64];
+  int64_t index = 0;
   while (number > 0) {
     remainders[index] = number % base;
     number = number / base;
     index++;
   }
   string_t result = malloc(sizeof(char) * (index + 1));
-  int index_result = 0;
-  for (int iteration = index - 1; iteration >= 0; iteration--) {
-    int remainder = remainders[iteration];
+  int64_t index_result = 0;
+  for (int64_t iteration = index - 1; iteration >= 0; iteration--) {
+    int64_t remainder = remainders[iteration];
     if (remainder >= 10) {
       result[index_result] = (char)((remainder - 10) + 'A');
     } else {
@@ -88,17 +88,17 @@ string_t convert_number_from_base_10_to_base(unsigned long long number, unsigned
   return result;
 }
 
-unsigned long convert_number_from_base_to_base_10(string_t number, unsigned long base) {
+uint64_t convert_number_from_base_to_base_10(string_t number, uint64_t base) {
   size_t length = string_get_length(number);
-  int exponent = length - 1;
-  unsigned long result = 0;
-  int index = 0;
+  int64_t exponent = length - 1;
+  uint64_t result = 0;
+  int64_t index = 0;
   while (exponent >= 0) {
-    int current_number = (int)(number[index] - '0');
+    int64_t current_number = (int64_t)(number[index] - '0');
     if (current_number >= 10) {
-      current_number = (int)(number[index] - 'A') + 10;
+      current_number = (int64_t)(number[index] - 'A') + 10;
     } else {
-      current_number = (int)(number[index] - '0');
+      current_number = (int64_t)(number[index] - '0');
     }
     result = result + current_number * mathematics_pow(base, exponent);
     exponent--;
@@ -107,6 +107,6 @@ unsigned long convert_number_from_base_to_base_10(string_t number, unsigned long
   return result;
 }
 
-string_t convert_number_from_base_to_another(string_t number, unsigned long base_from, unsigned long base_target) {
+string_t convert_number_from_base_to_another(string_t number, uint64_t base_from, uint64_t base_target) {
   return convert_number_from_base_10_to_base(convert_number_from_base_to_base_10(number, base_from), base_target);
 }
diff --git a/lib/convert.h b/lib/convert.h
index b1dc1e8..0258858 100644
--- a/lib/convert.h
+++ b/lib/convert.h
@@ -42,10 +42,10 @@ char convert_digit_to_character(const char digit);
  * @brief Convert a string to a number.
  *
  * @param string
- * @return long long
+ * @return int64_t
  * @since v1.0.0
  */
-long long convert_string_to_number(const string_t string);
+int64_t convert_string_to_number(const string_t string);
 
 /**
  * @brief Convert a number to a string.
@@ -54,7 +54,7 @@ long long convert_string_to_number(const string_t string);
  * @return string_t
  * @since v1.0.0
  */
-string_t convert_number_to_string(const long long integer);
+string_t convert_number_to_string(const int64_t integer);
 
 /**
  * @brief Convert a number (base 10) to a string with a specific base.
@@ -64,17 +64,17 @@ string_t convert_number_to_string(const long long integer);
  * @return string_t
  * @since v1.0.0
  */
-string_t convert_number_from_base_10_to_base(unsigned long long number, unsigned long base);
+string_t convert_number_from_base_10_to_base(uint64_t number, uint64_t base);
 
 /**
  * @brief Convert a number with a specific base to a number base 10.
  *
  * @param number
  * @param base
- * @return int
+ * @return uint64_t
  * @since v1.0.0
  */
-unsigned long convert_number_from_base_to_base_10(string_t number, unsigned long base);
+uint64_t convert_number_from_base_to_base_10(string_t number, uint64_t base);
 
 /**
  * @brief Convert a number with a specific base to a number of specific base.
@@ -85,6 +85,6 @@ unsigned long convert_number_from_base_to_base_10(string_t number, unsigned long
  * @return string_t
  * @since v1.0.0
  */
-string_t convert_number_from_base_to_another(string_t number, unsigned long base_from, unsigned long base_target);
+string_t convert_number_from_base_to_another(string_t number, uint64_t base_from, uint64_t base_target);
 
 #endif
diff --git a/lib/filesystem.c b/lib/filesystem.c
index 940ab08..782baeb 100644
--- a/lib/filesystem.c
+++ b/lib/filesystem.c
@@ -1,6 +1,6 @@
 #include "filesystem.h"
 
-int filesystem_read(string_t path, byte_t **file_content, off_t *file_size) {
+int filesystem_read(string_t path, byte_t **file_content, size_t *file_size) {
   int file_descriptor = open(path, O_RDONLY);
   if (file_descriptor == -1) {
     return -1;
@@ -15,7 +15,7 @@ int filesystem_read(string_t path, byte_t **file_content, off_t *file_size) {
   return 0;
 }
 
-int filesystem_write(string_t path, byte_t *file_content, off_t file_size) {
+int filesystem_write(string_t path, byte_t *file_content, size_t file_size) {
   int file_descriptor = open(path, O_WRONLY | O_CREAT | O_TRUNC, 0644);
   if (file_descriptor == -1) {
     return -1;
diff --git a/lib/filesystem.h b/lib/filesystem.h
index b590fb1..2ebe051 100644
--- a/lib/filesystem.h
+++ b/lib/filesystem.h
@@ -24,7 +24,7 @@
  * @return int
  * @since v1.0.0
  */
-int filesystem_read(string_t path, byte_t **file_content, off_t *file_size);
+int filesystem_read(string_t path, byte_t **file_content, size_t *file_size);
 
 /**
  * @brief Write the content to a file.
@@ -37,7 +37,7 @@ int filesystem_read(string_t path, byte_t **file_content, off_t *file_size);
  * @return int
  * @since v1.0.0
  */
-int filesystem_write(string_t path, byte_t *file_content, off_t file_size);
+int filesystem_write(string_t path, byte_t *file_content, size_t file_size);
 
 /**
  * @brief Check if a path exists.
diff --git a/lib/hash_map.c b/lib/hash_map.c
index a497925..060327b 100644
--- a/lib/hash_map.c
+++ b/lib/hash_map.c
@@ -40,7 +40,7 @@ uint64_t hash(string_t key, size_t capacity) {
     memcpy(&m, message + offset, sizeof(uint64_t));
     v3 ^= m;
 
-    for (int i = 0; i < 2; i++) {
+    for (uint8_t i = 0; i < 2; i++) {
       v0 = sip_round(v0, v1, v2, v3);
       v1 = ROTATE_LEFT(v1, 13);
       v2 = ROTATE_LEFT(v2, 16);
@@ -49,7 +49,7 @@ uint64_t hash(string_t key, size_t capacity) {
     }
 
     v2 ^= 0xff;
-    for (int i = 0; i < 4; i++) {
+    for (uint8_t i = 0; i < 4; i++) {
       v0 = sip_round(v0, v1, v2, v3);
       v1 = ROTATE_LEFT(v1, 13);
       v2 = ROTATE_LEFT(v2, 16);
@@ -90,7 +90,7 @@ uint64_t hash(string_t key, size_t capacity) {
 
   v3 ^= m;
 
-  for (int i = 0; i < 2; i++) {
+  for (uint8_t i = 0; i < 2; i++) {
     v0 = sip_round(v0, v1, v2, v3);
     v1 = ROTATE_LEFT(v1, 13);
     v2 = ROTATE_LEFT(v2, 16);
@@ -100,7 +100,7 @@ uint64_t hash(string_t key, size_t capacity) {
   v0 ^= m;
   v2 ^= 0xff;
 
-  for (int i = 0; i < 4; i++) {
+  for (uint8_t i = 0; i < 4; i++) {
     v0 = sip_round(v0, v1, v2, v3);
     v1 = ROTATE_LEFT(v1, 13);
     v2 = ROTATE_LEFT(v2, 16);
diff --git a/lib/mathematics.c b/lib/mathematics.c
index 158316f..f9c5bdd 100644
--- a/lib/mathematics.c
+++ b/lib/mathematics.c
@@ -1,23 +1,23 @@
 #include "mathematics.h"
 
-bool mathematics_equals(const double number1, const double number2) {
+bool mathematics_equals(const float64_t number1, const float64_t number2) {
   return (number1 - number2) < MATHEMATICS_DOUBLE_PRECISION;
 }
 
-unsigned long long mathematics_absolute_value(const long long number) {
+uint64_t mathematics_absolute_value(const int64_t number) {
   if (number >= 0) {
     return number;
   }
   return -number;
 }
 
-unsigned long long mathematics_pow(unsigned long long base, unsigned long long exponent) {
+uint64_t mathematics_pow(uint64_t base, uint64_t exponent) {
   return exponent == 0 ? 1 : base * mathematics_pow(base, exponent - 1);
 }
 
-double mathematics_root(double number, unsigned int nth_root) {
-  double result = number;
-  double previous_result = 0;
+float64_t mathematics_root(float64_t number, uint64_t nth_root) {
+  float64_t result = number;
+  float64_t previous_result = 0;
   while (!mathematics_equals(result, previous_result)) {
     result = (((nth_root - 1) * previous_result) + (number / mathematics_pow(result, nth_root - 1))) / nth_root;
     previous_result = result;
@@ -25,11 +25,11 @@ double mathematics_root(double number, unsigned int nth_root) {
   return result;
 }
 
-double mathematics_square_root(double number) {
+float64_t mathematics_square_root(float64_t number) {
   return mathematics_root(number, 2);
 }
 
-unsigned long long mathematics_factorial(unsigned long long number) {
+uint64_t mathematics_factorial(uint64_t number) {
   return number == 0 ? 1 : number * mathematics_factorial(number - 1);
 }
 
diff --git a/lib/mathematics.h b/lib/mathematics.h
index 66b56f7..2d693df 100644
--- a/lib/mathematics.h
+++ b/lib/mathematics.h
@@ -18,54 +18,54 @@
  * @return false
  * @since v1.0.0
  */
-bool mathematics_equals(const double number1, const double number2);
+bool mathematics_equals(const float64_t number1, const float64_t number2);
 
 /**
  * @brief Get the absolute value of a number.
  *
  * @param number
- * @return unsigned long long
+ * @return uint64_t
  * @since v1.0.0
  */
-unsigned long long mathematics_absolute_value(const long long number);
+uint64_t mathematics_absolute_value(const int64_t number);
 
 /**
  * @brief Calculates the power of a number.
  *
  * @param base
  * @param exponent
- * @return unsigned long long
+ * @return uint64_t
  * @since v1.0.0
  */
-unsigned long long mathematics_pow(unsigned long long base, unsigned long long exponent);
+uint64_t mathematics_pow(uint64_t base, uint64_t exponent);
 
 /**
  * @brief Calculates the nth root of a number.
  *
  * @param number
  * @param nth_root
- * @return double
+ * @return float64_t
  * @since v1.0.0
  */
-double mathematics_root(double number, unsigned int nth_root);
+float64_t mathematics_root(float64_t number, uint64_t nth_root);
 
 /**
  * @brief Calculates the square root of a number using Heron's method.
  *
  * @param number
- * @return double
+ * @return float64_t
  * @since v1.0.0
  */
-double mathematics_square_root(double number);
+float64_t mathematics_square_root(float64_t number);
 
 /**
  * @brief Calculates the factorial of a number.
  *
  * @param number
- * @return unsigned long long
+ * @return uint64_t
  * @since v1.0.0
  */
-unsigned long long mathematics_factorial(unsigned long long number);
+uint64_t mathematics_factorial(uint64_t number);
 
 /**
  * @brief Calulcates the opposite number (additive inverse).
diff --git a/lib/string.c b/lib/string.c
index b52253d..ca46b7a 100644
--- a/lib/string.c
+++ b/lib/string.c
@@ -296,7 +296,7 @@ bool string_get_is_substring(const string_t string, const string_t substring) {
   return is_substring;
 }
 
-string_t string_get_formatted_number(const long long number, string_t separator) {
+string_t string_get_formatted_number(const int64_t number, string_t separator) {
   string_t number_string_temp = convert_number_to_string(number);
   string_t number_string = number_string_temp;
   bool is_negative = number_string_temp[0] == '-';
@@ -433,7 +433,7 @@ string_t string_pad_start(const string_t string, const string_t pad_string, size
 }
 
 string_t string_zero_pad(uint64_t number, size_t places) {
-  string_t number_string = convert_number_to_string((long long)number);
+  string_t number_string = convert_number_to_string((int64_t)number);
   string_t pad_string = string_copy("0");
   string_t result = string_pad_start(number_string, pad_string, places);
   free(pad_string);
diff --git a/lib/string.h b/lib/string.h
index 36b8ffb..3025278 100644
--- a/lib/string.h
+++ b/lib/string.h
@@ -232,7 +232,7 @@ bool string_get_is_substring(const string_t string, const string_t substring);
  * @endcode
  * @since v1.0.0
  */
-string_t string_get_formatted_number(const long long number, string_t separator);
+string_t string_get_formatted_number(const int64_t number, string_t separator);
 
 /**
  * @brief Returns a pointer to the last occurrence of character in the string.
diff --git a/lib/terminal.c b/lib/terminal.c
index 4ee3ca1..7ba3938 100644
--- a/lib/terminal.c
+++ b/lib/terminal.c
@@ -21,6 +21,66 @@ string_t terminal_input() {
   return string;
 }
 
+void terminal_print_int(void* value) {
+  printf("%d", *(int*)value);
+}
+
+void terminal_print_bool(void* value) {
+  printf("%s", *(bool*)value ? "true" : "false");
+}
+
+void terminal_print_long(void* value) {
+  printf("%ld", *(long*)value);
+}
+
+void terminal_print_unsigned_long(void* value) {
+  printf("%lu", *(unsigned long*)value);
+}
+
+void terminal_print_float(void* value) {
+  printf("%f", *(float*)value);
+}
+
+void terminal_print_double(void* value) {
+  printf("%f", *(double*)value);
+}
+
+void terminal_print_int8_t(void* value) {
+  printf("%d", *(int8_t*)value);
+}
+
+void terminal_print_int16_t(void* value) {
+  printf("%d", *(int16_t*)value);
+}
+
+void terminal_print_int32_t(void* value) {
+  printf("%d", *(int32_t*)value);
+}
+
+void terminal_print_int64_t(void* value) {
+  printf("%ld", *(int64_t*)value);
+}
+
+void terminal_print_uint8_t(void* value) {
+  printf("%u", *(uint8_t*)value);
+}
+
+void terminal_print_uint16_t(void* value) {
+  printf("%u", *(uint16_t*)value);
+}
+
+void terminal_print_uint32_t(void* value) {
+  printf("%u", *(uint32_t*)value);
+}
+
+void terminal_print_uint64_t(void* value) {
+  printf("%lu", *(uint64_t*)value);
+}
+
+void terminal_print_char(void* value) {
+  printf("%c", *(string_t)value);
+}
+
 void terminal_print_array(void* array, size_t array_size, size_t element_size, void (*print_element)(void*)) {
   printf("[");
   for (size_t index = 0; index < array_size; index++) {
@@ -34,22 +94,6 @@ void terminal_print_array(void* array, size_t array_size, size_t element_size, v
   printf("]\n");
 }
 
-void terminal_print_int(void* value) {
-  printf("%d", *(int*)value);
-}
-
-void terminal_print_long(void* value) {
-  printf("%ld", *(long*)value);
-}
-
-void terminal_print_unsigned_long(void* value) {
-  printf("%lu", *(unsigned long*)value);
-}
-
-void terminal_print_char(void* value) {
-  printf("%c", *(string_t)value);
-}
-
 void terminal_print_string(void* value) {
   printf("%s", (string_t)value);
 }
@@ -64,7 +108,7 @@ void terminal_print_stack(struct stack* stack, void (*print_element)(void*)) {
   while (node_current != NULL) {
     printf("|\t");
     void* element = node_current->data;
-    print_element(&element);
+    print_element(element);
     node_current = node_current->next;
     printf("\t|\n");
   }
@@ -80,7 +124,7 @@ void terminal_print_queue(struct queue* queue, void (*print_element)(void*)) {
   while (node_current != NULL) {
     printf("|\t");
     void* element = node_current->data;
-    print_element(&element);
+    print_element(element);
     node_current = node_current->next;
     printf("\t|\n");
   }
@@ -96,7 +140,7 @@ void terminal_print_linked_list(struct linked_list* linked_list, void (*print_el
   while (node_current != NULL) {
     void* element = (string_t)node_current->data;
     node_current = node_current->next;
-    print_element(&element);
+    print_element(element);
     printf(" -> ");
   }
   printf("NULL\n");
@@ -116,12 +160,21 @@ void terminal_print_hash_map(struct hash_map* hash_map, void (*print_element)(vo
     printf("\t\"");
     terminal_print_string(key);
     printf("\" -> ");
-    print_element(&value);
+    print_element(value);
     printf("\n");
   }
   printf("}\n");
+  free(keys);
 }
 
 void terminal_print_array_list(struct array_list* list, void (*print_element)(void*)) {
-  terminal_print_array(list->data, list->size, sizeof(void*), print_element);
+  printf("[");
+  for (size_t index = 0; index < list->size; index++) {
+    void* element = list->data[index];
+    print_element(element);
+    if (index < list->size - 1) {
+      printf(", ");
+    }
+  }
+  printf("]\n");
 }
diff --git a/lib/terminal.h b/lib/terminal.h
index 7ff8667..0f7449e 100644
--- a/lib/terminal.h
+++ b/lib/terminal.h
@@ -23,17 +23,6 @@
  */
 string_t terminal_input();
 
-/**
- * @brief Print an array.
- *
- * @param array
- * @param array_size
- * @param element_size
- * @param print_element
- * @since v1.0.0
- */
-void terminal_print_array(void* array, size_t array_size, size_t element_size, void (*print_element)(void*));
-
 /**
  * @brief Print a int.
  *
@@ -42,6 +31,14 @@ void terminal_print_array(void* array, size_t array_size, size_t element_size, v
  */
 void terminal_print_int(void* value);
 
+/**
+ * @brief Print a boolean.
+ *
+ * @param value
+ * @since v5.0.0
+ */
+void terminal_print_bool(void* value);
+
 /**
  * @brief Print a long.
  *
@@ -58,6 +55,86 @@ void terminal_print_long(void* value);
  */
 void terminal_print_unsigned_long(void* value);
 
+/**
+ * @brief Print a float.
+ *
+ * @param value
+ * @since v5.0.0
+ */
+void terminal_print_float(void* value);
+
+/**
+ * @brief Print a double.
+ *
+ * @param value
+ * @since v5.0.0
+ */
+void terminal_print_double(void* value);
+
+/**
+ * @brief Print a int8_t.
+ *
+ * @param value
+ * @since v5.0.0
+ */
+void terminal_print_int8_t(void* value);
+
+/**
+ * @brief Print a int16_t.
+ *
+ * @param value
+ * @since v5.0.0
+ */
+void terminal_print_int16_t(void* value);
+
+/**
+ * @brief Print a int32_t.
+ *
+ * @param value
+ * @since v5.0.0
+ */
+void terminal_print_int32_t(void* value);
+
+/**
+ * @brief Print a int64_t.
+ *
+ * @param value
+ * @since v5.0.0
+ */
+void terminal_print_int64_t(void* value);
+
+/**
+ * @brief Print a uint8_t.
+ *
+ * @param value
+ * @since v5.0.0
+ */
+void terminal_print_uint8_t(void* value);
+
+/**
+ * @brief Print a uint16_t.
+ *
+ * @param value
+ * @since v5.0.0
+ */
+void terminal_print_uint16_t(void* value);
+
+/**
+ * @brief Print a uint32_t.
+ *
+ * @param value
+ * @since v5.0.0
+ */
+void terminal_print_uint32_t(void* value);
+
+/**
+ * @brief Print a uint64_t.
+ *
+ * @param value
+ * @since v5.0.0
+ */
+void terminal_print_uint64_t(void* value);
+
 /**
  * @brief Print a char.
  *
@@ -66,6 +143,17 @@ void terminal_print_unsigned_long(void* value);
  */
 void terminal_print_char(void* value);
 
+/**
+ * @brief Print an array.
+ *
+ * @param array
+ * @param array_size
+ * @param element_size
+ * @param print_element
+ * @since v1.0.0
+ */
+void terminal_print_array(void* array, size_t array_size, size_t element_size, void (*print_element)(void*));
+
 /**
  * @brief Print a string.
  *
diff --git a/lib/types.h b/lib/types.h
index 450e0cf..9896ebf 100644
--- a/lib/types.h
+++ b/lib/types.h
@@ -7,4 +7,7 @@ typedef uint8_t byte_t;
 
 typedef char* string_t;
 
+typedef float float32_t;
+typedef double float64_t;
+
 #endif
diff --git a/main.c b/main.c
index e21d9d4..7bb7811 100644
--- a/main.c
+++ b/main.c
@@ -4,8 +4,123 @@
 #include "libcproject.h"
 
 int main() {
+  int integer = 5;
+  terminal_print_int(&integer);
+  printf("\n");
+
+  bool boolean = true;
+  printf("terminal_print_bool: ");
+  terminal_print_bool(&boolean);
+  printf(", ");
+  boolean = false;
+  terminal_print_bool(&boolean);
+  printf("\n");
+
+  long integer_long = 5;
+  printf("terminal_print_long: ");
+  terminal_print_long(&integer_long);
+  printf("\n");
+
+  unsigned long integer_unsigned_long = 5;
+  printf("terminal_print_unsigned_long: ");
+  terminal_print_unsigned_long(&integer_unsigned_long);
+  printf("\n");
+
+  float floating_point = 5.5;
+  printf("terminal_print_float: ");
+  terminal_print_float(&floating_point);
+  printf("\n");
+
+  double floating_point_double = 5.5;
+  printf("terminal_print_double: ");
+  terminal_print_double(&floating_point_double);
+  printf("\n");
+
+  int8_t integer_8 = 5;
+  printf("terminal_print_int8_t: ");
+  terminal_print_int8_t(&integer_8);
+  printf("\n");
+
+  int16_t integer_16 = 5;
+  printf("terminal_print_int16_t: ");
+  terminal_print_int16_t(&integer_16);
+  printf("\n");
+
+  int32_t integer_32 = 5;
+  printf("terminal_print_int32_t: ");
+  terminal_print_int32_t(&integer_32);
+  printf("\n");
+
+  int64_t integer_64 = 5;
+  printf("terminal_print_int64_t: ");
+  terminal_print_int64_t(&integer_64);
+  printf("\n");
+
+  uint8_t integer_unsigned_8 = 5;
+  printf("terminal_print_uint8_t: ");
+  terminal_print_uint8_t(&integer_unsigned_8);
+  printf("\n");
+
+  uint16_t integer_unsigned_16 = 5;
+  printf("terminal_print_uint16_t: ");
+  terminal_print_uint16_t(&integer_unsigned_16);
+  printf("\n");
+
+  uint32_t integer_unsigned_32 = 5;
+  printf("terminal_print_uint32_t: ");
+  terminal_print_uint32_t(&integer_unsigned_32);
+  printf("\n");
+
+  uint64_t integer_unsigned_64 = 5;
+  printf("terminal_print_uint64_t: ");
+  terminal_print_uint64_t(&integer_unsigned_64);
+  printf("\n");
+
+  char character = 'c';
+  printf("terminal_print_char: ");
+  terminal_print_char(&character);
+  printf("\n");
+
+  int array[] = {1, 2, 3, 4, 5};
+  printf("terminal_print_array: ");
+  terminal_print_array(array, 5, sizeof(int), terminal_print_int);
+
   string_t string = "Hello, world!";
-  printf("%s\n", string);
-  printf("string_length = %ld\n", string_get_length(string));
+  printf("terminal_print_string: ");
+  terminal_print_string(string);
+  printf("\n");
+
+  struct stack* stack = stack_initialization();
+  stack_push(stack, &integer);
+  printf("terminal_print_stack: ");
+  terminal_print_stack(stack, terminal_print_int);
+  stack_free(stack);
+
+  struct queue* queue = queue_initialization();
+  queue_push(queue, &integer);
+  printf("terminal_print_queue: ");
+  terminal_print_queue(queue, terminal_print_int);
+  queue_free(queue);
+
+  struct linked_list* linked_list = linked_list_initialization();
+  linked_list_add_after_last(linked_list, string);
+  linked_list_add_after_last(linked_list, string);
+  printf("terminal_print_linked_list: ");
+  terminal_print_linked_list(linked_list, terminal_print_string);
+  linked_list_free(linked_list);
+
+  struct hash_map* hash_map = hash_map_initialization();
+  hash_map_add(hash_map, "key", &integer);
+  printf("terminal_print_hash_map: ");
+  terminal_print_hash_map(hash_map, terminal_print_int);
+  hash_map_free(hash_map);
+
+  struct array_list* array_list = array_list_initialization();
+  array_list_add(array_list, &integer);
+  array_list_add(array_list, &integer);
+  printf("terminal_print_array_list: ");
+  terminal_print_array_list(array_list, terminal_print_int);
+  array_list_free(array_list);
+
   return EXIT_SUCCESS;
 }