C Program to Count Number of Digits in a Number

C Program to Count Number of Digits in a Number

C program to count number of digits in a number; Through this tutorial, you will learn how to count or find number of digits in a number in c program using For Loop, While Loop, Functions, and Recursion.

Algorithm to count the number of digits in a number

Use the following steps to write a program to count number of digits in a number; as follows:

  1. Read integer number and store it into a variable.
  2. Initialize another variable to store total digits say count = 0.
  3. If num > 0 then increment count by 1 i.e. count++.
  4. Divide num by 10 to remove the last digit of the given number i.e. num = num / 10.
  5. Repeat step 3 to 4 till num > 0 or num != 0.
  6. Print number of count in a number

Programs to Count Number of Digits in a Number in C

  • C Program to Count Number of Digits in a Number using While Loop
  • C Program to Count Number of Digits in a Number using For Loop
  • C Program to Count Number of Digits in a Number Using Functions
  • C Program to Count Number of Digits in a Number Using Recursion

C Program to Count Number of Digits in a Number using While Loop

/* C Program to Count Number of Digits in a Number using While Loop */
#include <stdio.h>

int main()
{
  int Number, Reminder, Count=0;

  printf("\n Please Enter any number :- ");
  scanf("%d", &Number);

  while(Number > 0)
  {
     Number = Number / 10;
     Count = Count + 1;  
  }

  printf("\n Number of Digits in a Given Number = %d", Count);
  return 0;
}

The output of the above c program; as follows:

Please Enter any number :- 123456
Number of Digits in a Given Number = 6

C Program to Count Number of Digits in a Number using For Loop

/* C Program to Count Number of Digits in a Number using For Loop */ 

#include <stdio.h>

int main()
{
  int Number, Reminder, Count;

  printf("\n Please Enter any number :- ");
  scanf("%d", &Number);

  for (Count=0; Number > 0;Number=Number/10)
  {
     Count=Count + 1;  
  }

  printf("\n Number of Digits in a Given Number = %d", Count);

  return 0;
}

The output of the above c program; as follows:

Please Enter any number :- 145698
Number of Digits in a Given Number = 6

C Program to Count Number of Digits in a Number Using Functions

/* C Program to Count Number of Digits in a Number using While Loop */
#include <stdio.h>

int Count_Of_Digits (int Number)
{
 int c = 0;
 
  while(Number > 0)
  {
     Number = Number / 10;
     c = c + 1;  
  }

  printf("\n Number of Digits in a Given Number = %d", c);
}

int main()
{
  int Number;

  printf("\n Please Enter any number :- ");
  scanf("%d", &Number);
  
  Count_Of_Digits (Number);

  return 0;
}

The output of the above c program; as follows:

Please Enter any number :- 123456789
Number of Digits in a Given Number = 9

C Program to Count Number of Digits in a Number Using Recursion

/* C Program to Count Number of Digits in a Number Using Recursions */

#include <stdio.h>

int Count_Of_Digits (int); 

int main()
{
  int Number, Count = 0;

  printf("\n Please Enter any number :- ");
  scanf("%d", &Number);

  Count = Count_Of_Digits (Number);

  printf("\n Number of Digits in a Given Number = %d", Count);
  return 0;
}

int Count_Of_Digits (int Number)
{
  static int Count =0;

  if(Number > 0)
  {
     Count = Count + 1;  
     Count_Of_Digits (Number / 10);
  }

 return Count;
}

The output of the above c program; as follows:

Please Enter any number :- 41236
Number of Digits in a Given Number = 5

Recommended C Programs

AuthorAdmin

My name is Devendra Dode. I am a full-stack developer, entrepreneur, and owner of Tutsmake.com. I like writing tutorials and tips that can help other developers. I share tutorials of PHP, Python, Javascript, JQuery, Laravel, Livewire, Codeigniter, Node JS, Express JS, Vue JS, Angular JS, React Js, MySQL, MongoDB, REST APIs, Windows, Xampp, Linux, Ubuntu, Amazon AWS, Composer, SEO, WordPress, SSL and Bootstrap from a starting stage. As well as demo example.

Leave a Reply

Your email address will not be published. Required fields are marked *