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Switch in C

Switch in C

? switch Statement in C

The switch statement in C is used to execute one block of code among many options, based on the value of a variable or expression.


? Basic Syntax

c

#include <stdio.h>int main() { 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("Invalid day\n"); } return 0;}

? Output:

mathematica

Wednesday


?? Fall-through Example (No break)

c

int grade = 2;switch(grade) { case 1: case 2: case 3: printf("Passed\n"); break; case 4: printf("Failed\n"); break;}

? Output:

nginx

Passed


? When to Use switch

Use switch when:

  • You have many fixed options (like menu choices)

  • You want cleaner alternatives to long if...else if chains

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