By | 26.03.2017

# C Program to convert Number to String

Write a C Program to convert Number to String using Recursion. Here’s simple Program to convert Number to 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.

Below is the source code for C Program to convert Number to String using Recursion which is successfully compiled and run on Windows System to produce desired output as shown below :

### SOURCE CODE : :

```/* C Program to convert number to string */

#include<stdio.h>
void f(long int n, char str[]);
int main()
{
long int num;
printf("Enter any number to convert to String :: ");
scanf("%ld",&num);
char str;
f(num, str);
printf("\nAfter Converting Number to String :: ");
puts(str);

printf("\nEnter another number to convert to String :: ");
scanf("%ld",&num);
f(num, str);
printf("\nAfter Converting 2nd Number to String :: ");
puts(str);
}

void f(long int n, char s[])
{
static int i=0;
if(n==0)
{
i=0; /*If value of i is not made zero here, then fn will not work
correctly if called more than once in the main() */

return;
}
f(n/10, s);
s[i++] = n%10  + '0';
s[i]='\0';
}```

### OUTPUT  : :

```***************** OUTPUT **********************

Enter any number to convert to String :: 1234

After Converting Number to String :: 1234

Enter another number to convert to String :: 6789

After Converting 2nd Number to String :: 6789```

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