Reverse a String Dry Run in C

Reverse a String is an interactive C dry run visualizer from the Strings programs section. Study the source code, then use the execution controls to follow each step, variable update, highlighted line, and console output.

This page provides a browser-based dry run with source-code highlighting, auto-scroll, voice narration controls, and execution output for learning the program step by step.

Reverse a String Program Code

#include <stdio.h>
int main() {
    char str[] = "abcdef";
    int length = 0, i;
    char temp;
    
    // Find length
    while(str[length] != '\0') {
        length++;
    }
    
    // Reverse using two-pointer approach
    for(i = 0; i < length/2; i++) {
        temp = str[i];
        str[i] = str[length-1-i];
        str[length-1-i] = temp;
    }
    
    printf("Reversed string: %s\n", str);
    return 0;
}

View the complete Strings programs page.