Rules for switch statement

• Switch expression should be an integer or character data type.
• Case value must be an integer or constant value.
• We can use only case value inside the switch statement.
• Break statement is not mandatory in switch. It is optional.
• If a program does not find a break statement in switch expression, all the cases in the switch will be executed along with the matched case.

Syntax for switch statement

switch(expression){    
case value1:    
//code to be executed;    
break;  //optional  
case value2:    
//code to be executed;    
break;  //optional  
......    
default:     
code to be executed if all cases are not matched;    
}    

Flow chart for switch

Sample Program

    #include<stdio.h>

    int main() {
      int number = 0;
      printf("enter a number:");
      scanf("%d", & number);
      switch (number) {
      case 10:
        printf("number is equals to 10");
        break;
      case 50:
        printf("number is equal to 50");
        break;
      case 100:
        printf("number is equal to 100");
        break;
      default:
        printf("number is not equal to 10, 50 or 100");
      }
      return 0;
    }

Output

]]> https://www.wikitechy.com/interview-questions/c/what-is-switch-statement-in-c-with-example/feed/ 0 https://www.wikitechy.com/interview-questions/recursion-and-iteration/what-is-the-output-of-this-c-code-recursive-function-in-c-program/ https://www.wikitechy.com/interview-questions/recursion-and-iteration/what-is-the-output-of-this-c-code-recursive-function-in-c-program/#respond Sat, 28 Aug 2021 17:14:35 +0000 https://www.wikitechy.com/interview-questions/?p=2646

Function main() {
  integer a = 5, b = 7
  Switch(a) {
    Case 5: print "I am 5"
    Break
    Case b: print "I am not 5"
    Break
    Default: print "I am different"
  }
}

Answer : D. Error

Function main() {
  integer a = 5, b = 7
  Switch(a) {
    Case 5: print "I am 5"
    Break
    Case b: print "I am not 5"
    Break
    Default: print "I am different"
  }
}

Answer : D. Error