C++ Count Number of Digits in a given Number

Hello Everyone!

In this tutorial, we will learn how to determine the number of digits in a given number, using C++.

Code:

#include <iostream>
using namespace std;
int main()
{
 cout << "\n\nWelcome to Studytonight :-)\n\n\n";
 cout << " ===== Program to count the number of digits in a given number ===== \n\n";
 //variable declaration
 int n, n1, num = 0;
 //taking input from the command line (user)
 cout << " Enter a positive integer : ";
 cin >> n;
 n1 = n; //storing the original number
 //Logic to count the number of digits in a given number
 while (n != 0)
 {
 n /= 10; //to get the number except the last digit.
 num++; //when divided by 10, updated the count of the digits
 }
 cout << "\n\nThe number of digits in the entered number: " << n1 << " is " << num;
 cout << "\n\n\n";
 return 0;
}

Output:

C++ count number of digits program output

We hope that this post helped you develop a better understanding of the logic to compute the number of digits in an entered number, in C++. For any query, feel free to reach out to us via the comments section down below.

Keep Learning : )