Question

How to write a recursive function that counts digits of a number in JavaScript

Answer 1

function countDigits(number) {
    // Base case: If the number is reduced to zero, return 0
    if (number === 0) {
        return 0;
    }

    // Recursive case: Divide the number by 10 and count recursively
    return 1 + countDigits(Math.floor(number / 10));
}

const num = 48071;

console.log(`Number of digits in ${num} is: ${countDigits(num)}`); 



/*
run:

Number of digits in 48071 is: 5

*/

 

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