Calculate length of string using recursion

Write a C program to calculate length of string using recursion. Here’s simple program to calculate length of string using recursion in C Programming Language.

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.

Here is the source code of the C program to calculate length of string 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 calculate length of string using recursion */

#include <stdio.h>

//function to calculate length of string using recursion

int stringLength(char *str)
{
    static int length=0;
    if(*str!=NULL)
    {
        length++;
        stringLength(++str);
    }
    else
    {
        return length;
    }
}

int main()
{
    char str[100];
    int length=0;

    printf("Enter any string :: ");
    scanf("%s",str);

    length=stringLength(str);

    printf("\nLength of String [ %s ] is :: %d\n",str,length);

    return 0;
}

Output : :

/*  C program to calculate length of string using recursion */

Enter any string :: CodezClub

Length of String [ CodezClub ] is :: 9

Process returned 0

Above is the source code for C program to calculate length of string using recursion which is successfully compiled and run on Windows System.The Output of the program is shown above .

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