C Reverse String

Examples of Reverse String in C

Following are the different examples of reverse string in c using various methods.

Example #1 – Using For Loop

Code:

#include <stdio.h>
#include <string.h>
int main ()
{
// char array to take input
char inputString[100];
// char array to build output
char outputString[100];
int length;
int i;
// Take input from the user : input in character array
printf( "Please Enter a string to be reversed \n" );
scanf( "%s", inputString );
// Find the number of characters or length of a string using in built function strlen() from string.h library
length = strlen( inputString );
int j = 0;
// Traverse character by character from end to start and form a new string
for( i = length - 1; i >= 0; i--) {
outputString[ j ] = inputString[ i ];
j++;
}
printf( "The reversed string is: ");
printf( "%s", outputString );
printf( "\n" );
return 0;
}

Output:

Here, we have used strlen() from the <string.h> library to find out the count of characters present in the input string and passed it in for loop. We have parsed array from end to start and appended characters in reverse order in an output array using for loop.