28 lines
1.1 KiB
JavaScript
28 lines
1.1 KiB
JavaScript
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/**
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* @function armstrongNumber
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* @description Vérifie si un nombre fait partie des nombres d'Armstrong.
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* @param {number} number - Le nombre à tester
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* @returns {string}
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* @example armstrongNumber(153) → 153 est un nombre d'Armstrong, car 1<sup>3</sup> + 5<sup>3</sup> + 3<sup>3</sup> = 153.
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*/
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function armstrongNumber(number) {
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let numberString = number.toString();
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let numberStringLength = numberString.length;
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let result = 0;
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let resultString = "";
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for (let i = 0; i < numberStringLength; i++) {
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result = result + parseInt(numberString[i])**numberStringLength;
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resultString = resultString + " + " + numberString[i] + "<sup>" + numberStringLength + "</sup>";
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}
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const formattedNumber = formatNumberResult(number);
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if (result === number) {
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return `${formattedNumber} est un nombre d'Armstrong, car ${resultString.slice(2)} = ${formatNumberResult(result)}.`;
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} else {
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return `${formattedNumber} n'est pas un nombre d'Armstrong, car ${resultString.slice(2)} = ${formatNumberResult(result)}.`;
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}
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}
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/* Exports */
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export { armstrongNumber };
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