Constant Expressions as Case Labels Dry Run in C

Constant Expressions as Case Labels 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.

Constant Expressions as Case Labels Program Code

#include <stdio.h>
int main() {
    int a = 300;
    
    switch(a) {
        case 10 + 20 + 70:   // 100
            printf("Case 10+20+70 = 100\n");
            break;
        case 100 + 200:       // 300
            printf("Case 100+200 = 300\n");
            break;
        default:
            printf("default\n");
            break;
    }
    return 0;
}

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