**`strrev()`** is a non-standard C library function, sometimes found in `<string.h>`, that is used to reverse a string. For instance, 
 *'coffee'*, when passed to the function, will output *'eeffoc.'* 



> Note: Being non-standard means that `strrev()`  may not be available. So, you may have to write your own function to reverse a string.

The function is defined as:


# Code
The usage of `strrev()` is illustrated below:

#include<stdio.h>
#include<string.h>

int main() {
    char str[20] = "coffee";
    
    printf("String before strrev(): %s\n",str);
    
    strrev(str);
    
    printf("String after strrev(): %s\n",str);

    return 0;
}

How to use strrev in C

Code