To calculate the number of digit in any Given number

Question - given any Integer number, we  have to find the number of digit in that number.

Example - 

Input : 1254

Output : 4

Input : 12563

Output : 5

Approach -

First we declare a count variable with 0 and divide number and increase count until number is greater than 0.

Implementation - 

//To find the no of digit in a given number

#include<iostream>

using namespace std;

int countdigit(int num)

{

    int count=0;

    while(num){

        num/=10;

        count++;

    }

    return count;

}

int main()

{

    int num;

    cout<<"Enter the Integer number to find the no of digit : ";

    cin>>num;

    int count=countdigit(num);

    cout<<"Number of digit in "<<num<<" is : "<<count<<endl;

    return 0;

    

}

code on compiler

Time complixity - O(n)