Algorithm for the recursive sum of all the digits in a number. Example: 942 --> 9 + 4 + 2 = 15 --> 1 + 5 = 6.
Could someone tell me why there is a correct sum in the console when i print it by console.log but when i want to return there is undefined?
let sum = 0;
const sumOfDigits = (num) => {
let number = num.toString();
if (number.length > 1) {
sum = 0;
[...number].forEach((digit) => {
sum += Number(digit);
});
sumOfDigits(sum);
} else {
console.log(sum);
return sum;
}
};
console.log(sumOfDigits(942));
You dont return the value for all the calls
Change sumOfDigits(sum); to return sumOfDigits(sum); like below
let sum = 0;
const sumOfDigits = (num) => {
let number = num.toString();
if (number.length > 1) {
sum = 0;
[...number].forEach((digit) => {
sum += Number(digit);
});
return sumOfDigits(sum);
} else {
console.log(sum);
return sum;
}
};
console.log(sumOfDigits(942));