feat(solutions): add is-prime-number/rust/function

challenges/is-prime-number/solutions/rust/function/src/main.rs

@@ -0,0 +1,19 @@
+use std::io;
+
+fn is_prime_number(number: u32) -> bool {
+    for iteration in 2..number {
+        if number % iteration == 0 {
+            return false;
+        }
+    }
+    return true;
+}
+
+fn main() {
+    let mut number = String::new();
+    io::stdin()
+        .read_line(&mut number)
+        .expect("Failed to read `stdin` line.");
+    let number: u32 = number.trim().parse().expect("Please type a number!");
+    println!("{}", is_prime_number(number));
+}