Replace a Character in a String Dry Run in C

Replace a Character in 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.

Replace a Character in a String Program Code

#include <stdio.h>
int main() {
    char str[] = "banana";
    char oldChar = 'a';
    char newChar = 'o';
    int i = 0;
    
    printf("Original: %s\n", str);
    
    while(str[i] != '\0') {
        if(str[i] == oldChar) {
            str[i] = newChar;
        }
        i++;
    }
    
    printf("After replacement: %s\n", str);
    return 0;
}

View the complete Strings programs page.