By | 28.11.2016

# 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;
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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Category: C Programming Recursion Programs Tags:  