Question

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

Answer 1

function countDigits(number: number): 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: number = 8701;

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



/*
run:

"Number of digits in 8701 is: 4" 

*/

 

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