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Basic
Switch Case
Goto
Operators
if Statement
Nested if
While Loop
For Loop
Patterns
Array
2D Array
String Function Example
Pointers
Recursion Function
Structure
Excersises
Others



C Program to Reverse a String


Write a C program that reverses a given string.

  • Reads a string character-by-character using getchar() until a newline is encountered.
  • Stores each character into the array str while tracking the index i.
  • Prints the string in reverse order using a loop from i - 1 to 0.
  • Displays the reversed string followed by a newline.
Example : pgm.c 
#include <stdio.h>

int main() {
    char str[100];
    int i = 0, j;

    printf("Enter a string: ");

    // Read characters manually until newline
    while ((str[i] = getchar()) != '\n') {
        i++;
    }

    // Print in reverse
    printf("Reversed string: ");
    for (j = i - 1; j >= 0; j--) {
        printf("%c", str[j]);
    }

    printf("\n");
    return 0;
}

Output:

Enter a string: Welcome
Reversed string: emocleW