check_armstrong_number.js

// This function checks if a given number is an Armstrong number.
// An Armstrong number is a number that is equal to the sum of its own digits each raised to the power of 3.
function checkArmstrong(x) {
    // Store the original number to compare with the calculated sum later
    var originalNum = x;
    var sum = 0;
    // Extract and process each digit of the number
    while (x > 0) {
        var lastDigit = x % 10; // Get the last digit
        sum = sum + Math.pow(lastDigit, 3); // Add the cube of the digit to the sum
        x = Math.floor(x / 10); // Remove the last digit
    }
    // Check if the sum of cubes of digits is equal to the original number
    return sum === originalNum;
}
// Test case: Check if 371 is an Armstrong number
var armstrongNums = 371;
var isArmstrong = checkArmstrong(armstrongNums);
console.log(isArmstrong); // Output: true (371 is an Armstrong number)