Fall-Through Behavior (Without Break) Dry Run in C

Fall-Through Behavior (Without Break) is an interactive C dry run visualizer from the Switch 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.

Fall-Through Behavior (Without Break) Program Code

#include <stdio.h>
int main() {
    int a = 20;
    
    switch(a) {
        case 10:
            printf("10\n");
            // No break - fall-through
        case 20:
            printf("20\n");
            // No break - fall-through
        case 30:
            printf("30\n");
            break;
        case 40:
            printf("40\n");
            break;
        default:
            printf("default\n");
            break;
    }
    return 0;
}

View the complete Switch programs page.