Question

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

Answer 1

package main

import (
    "fmt"
)

func 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)
}

func main() {
    num := 90871
    
    fmt.Printf("Number of digits in %d is: %d\n", num, countDigits(num)) 
}



/*
run:

Number of digits in 90871 is: 5

*/

 

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