Q:

Write a C program to Count number of digits using recursion

robaa
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2022-11-24
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Write a C program to Count number of digits using recursion. Here’s simple program to Count number of digits using recursion in C Programming Language.

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robaa
2022-11-24
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Recursion : :

  • Recursion is the process of repeating items in a self-similar way. In programming languages, if a program allows you to call a function inside the same function, then it is called a recursive call of the function.
  • The C programming language supports recursion, i.e., a function to call itself. But while using recursion, programmers need to be careful to define an exit condition from the function, otherwise it will go into an infinite loop.
  • Recursive functions are very useful to solve many mathematical problems, such as calculating the factorial of a number, generating Fibonacci series, etc.

Problem : :

Here is the source code of the C program to Count number of digits using recursion. The C Program is successfully compiled and run on a Windows system. The program output is also shown below.

 
 

SOURCE CODE : :

/*  C program to Count number of digits using recursion  */

#include <stdio.h>


int countDigits(int num)
{
    static int count=0;

    if(num>0)
    {
        count++;
        countDigits(num/10);
    }
    else
    {
        return count;
    }
}


int main()
{
    int number;
    int count=0;

    printf("Enter any number :: ");
    scanf("%d",&number);

    count=countDigits(number);

    printf("\nTotal number of digits in [ %d ] are :: %d\n",number,count);

    return 0;
}

Output : :

/*  C program to Count number of digits using recursion  */

Enter any number :: 12345678

Total number of digits in [ 12345678 ] are :: 8

Process returned 0

Above is the source code for C Program to Count number of digits using Recursion which is successfully compiled and run on Windows System.The Output of the program is shown above .

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C Recursion Solved Programs – C Programming
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