Question

How to write a recursive function that counts digits of a number in Node.js

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 = 901841;
 
console.log(`Number of digits in ${num} is: ${countDigits(num)}`); 
 
 
 
/*
run:
 
Number of digits in 901841 is: 6
 
*/

 

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