Switch Statement in C Program

Switch Statement in C Program

In this post, We will learn about switch case statement in the C programming language. The if..else..if ladder allows you to execute a block code among many alternatives. If you are checking on the value of a single variable in if...else...if, it is better to use a switch statement.

Syntax Switch-Case in C

 switch (n)  
 ​{  
   case constant1:  
     // code to be executed if n is equal to constant1;  
     break;  
   case constant2:  
     // code to be executed if n is equal to constant2;  
     break;  
     .  
     .  
     .  
   default:  
     // code to be executed if n doesn't match any constant  
 }  

Example: Take a character input and find if the input is +, -, * or /. 

 # include <stdio.h>  
 int main() {  
   char operator;  
   printf("Enter an operator (+, -, *, /): ");  
   scanf("%c", &operator);  
   switch(operator)  
   {  
     case '+':  
       printf("+ Operator");  
       break;  
     case '-':  
       printf("- Operator");  
       break;  
     case '*':  
       printf("* Operator");  
       break;  
     case '/':  
       printf("/ Operator");  
       break;  
     // operator is doesn't match any case constant (+, -, *, /)  
     default:  
       printf("Error! operator is not correct");  
   }  
   return 0;  
 }  

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