Reverse the String Using Recursion

3. Reverse the String Using Pointer in C

For this method, we will use recursion to swap the characters.

Implementation

C

// C program to reverse string using recursion
#include <stdio.h>
#include <string.h>
 
// recursive function to reverse string
void reverse(char* str, int len, int i, int temp)
{
    // if current index is less than the remaining length of
    // string
    if (i < len) {
        temp = str[i];
        str[i] = str[len - 1];
        str[len - 1] = temp;
        i++;
        len--;
        reverse(str, len, i, temp);
    }
}
 
// driver code
int main()
{
    char str[100] = "string";
    printf("Original String: %s\n", str);
 
    int len = strlen(str);
    reverse(str, len, 0, 0);
 
    printf("Reversed String: %s", str);
    return 0;
}

Output

Original String: string
Reversed String: gnirts

Reverse String in C

Reversing a string in C is a fundamental operation that involves rearranging the characters in a string so that the last character becomes the first, the second-to-last character becomes the second, and so on.

For example,

Original String:
"string"

Reversed String:
"gnirts"

In this article, we will discuss different ways to reverse a string in C with code examples.

Tags:

#C Language #C Programs

1. Reverse the String Using Loop

3. Reverse the String Using Pointer in C

Reverse the String Using Recursion

Implementation

C

Reverse String in C

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