Switch Statement in C

Introduction

Switch case statements are a substitute for long if statements that compare a variable to several "integral" values. Switch statement is a selection statement. The Switch Statement in C language is much similar to nested if. else statements. Switch statement has built-in multiple branch structure. Switch statement is multiple way decision statement like if. else statement. Switch statement takes an expression/variable as input. The basic format for using switch case is outlined below. The value of the variable given into switch is compared to the value following each of the cases, and when one value matches the value of the variable the computer continues executing the program from that point.

Syntax of a switch statement : the general syntax of a switch statement is given below

 Switch(expression)
  {
  case value 1:
       statements;
       break;
  case value 2:
       statements;
       break;
  case value n:
       statements;
       break;
  default:
       statements;
       break;
}

Example :  This is a simple example of a switch statement.

#include<stdio.h>
#include<conio.h>
int main()
{
clrscr();
char choice;
printf("\n Enter your choice: A , b or C \n");
choice=getchar();
switch(choice)
{
case 'A': printf("The choice is upper case A\n");
case 'b': printf("The choice is lower case b\n");
case 'C': printf("The choice is upper case C\n");
default: printf("There is no choice matched or you didn't
entered any choice.");
}
getch();
return 0;
}

Output

Enter your choice : A , b or C
b
The choice is lower case b
The choice is upper case C
There is no choice matched or you didn't entered any choice.