Question

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

Answer 1

fun countDigits(number: Int): Int {
    // Base case: If the number is 0, return 0
    if (number == 0) {
        return 0
    }
    // Recursive case: Divide the number by 10 and count recursively
    return 1 + countDigits(number / 10)
}

fun main() {
    val num = 903674
    
    println("Number of digits in $num is: ${countDigits(num)}") 
}

   
      
/*
run:

Number of digits in 903674 is: 6
  
*/

 

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