Write a javascript program without build in function armstrong number

Question

Anónimo · Accepted Answer

function isArmstrong(num) {
    let temp = num;
    let count = 0;
    let sum = 0;
    
    // Count the number of digits
    let n = temp;
    while (n > 0) {
        count++;
        n = Math.floor(n / 10);
    }

// Calculate sum of digits raised to the power of count
    n = temp;
    while (n > 0) {
        let digit = n % 10; // Get last digit
        let power = 1;

// Compute digit^count manually
        for (let i = 0; i < count; i++) {
            power *= digit;
        }

sum += power;
        n = Math.floor(n / 10); // Remove last digit
    }

return sum === num;
}

// Test the function
let number = 153;
console.log(number + " is an Armstrong number? " + isArmstrong(number));

number = 9474;
console.log(number + " is an Armstrong number? " + isArmstrong(number));

number = 123;
console.log(number + " is an Armstrong number? " + isArmstrong(number));

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