Switch

Switch

The switch statement selects one of many code blocks to execute based on the value of an expression.

Basic Syntax

int day = 3;
switch (day) {
    case 1:
        printf("Monday\n");
        break;
    case 2:
        printf("Tuesday\n");
        break;
    case 3:
        printf("Wednesday\n");
        break;
    default:
        printf("Other\n");
        break;
}

Bridge stations: each crew member mans a different console. Helm, navigation, tactical -- switch to the right station for the job.

The break Statement

Each case must end with break, otherwise execution falls through to the next case:

int x = 1;
switch (x) {
    case 1:
        printf("one\n");
        // no break -- falls through!
    case 2:
        printf("two\n");
        break;
}
// prints: one
//         two

Fall-through on Purpose

Sometimes fall-through is intentional, to handle multiple cases the same way:

switch (day) {
    case 6:
    case 7:
        printf("Weekend\n");
        break;
    default:
        printf("Weekday\n");
        break;
}

default

The default case runs when no other case matches. It is optional but recommended.

Switch vs if-else

Use switch when comparing a single value against multiple constants. Use if-else for ranges or complex conditions.

Your Task

Write a function const char *day_type(int day) that returns "weekend" if day is 6 or 7, and "weekday" otherwise (1-5). Print the result for days 1, 6, and 7.