Switch statement in C

switch statement is used to execute the code from multiple conditions depending on the value of an expression

Syntax:

switch(expression){
  case lable1:
        //execute your code
        break;
  case n:
        //execute your code
         break;
  default:
        //execute your code
         break;
        }

Note:- wehre expression refers any int or char expression or vaiable. <label1>,<label2><labeln> are values which will match with the value of the expression. brak is satement which will transfer the control to the end of switch statement.

Example 1:

     #include<stdio.h>
 main(){
    int a;
    printf("Please enter a no between 1 and 5: ");
    scanf("%d",&a);
    switch(a){
    case 1:
    printf("You chose One");
    break;
    case 2:
    printf("You chose Two");
    break;
    case 3:
    printf("You chose Three");
    break;
    case 4:
    printf("You chose Four");
    break;
    case 5:
    printf("You chose Five.");
    break;
    default :
    printf("Invalid Choice. Enter a no between 1 and 5");
    break;
    }
} 

Output

Example 2:

#include<stdio.h>
#include<conio.h>

void main()
{
int ch;
clrscr();
printf("Enter any number (1 to 7)");
scanf("%d",&ch);
switch(ch)
{
case  1:
printf("Today is Monday");
break;
case  2:
printf("Today is Tuesday");
break;
case  3:
printf("Today is Wednesday");
break;
case  4:
printf("Today is Thursday");
break;
case  5:
printf("Today is Friday");
break;
case  6:
printf("Today is Saturday");
break;
case  7:
printf("Today is Sunday");
break;
default:
printf("Only enter value 1 to 7");
}
getch();
}

Output

    Enter any number (1 to 7): 5 Today is Friday

Example 3:

#include<stdio.h>
#include<conio.h>

void main()
{
int ch;
clrscr();
printf("Enter any number (1 to 7)");
scanf("%d",&ch);
switch(ch)
{
case  1:
printf("Today is Monday");
case  2:
printf("Today is Tuesday");
case  3:
printf("Today is Wednesday");
case  4:
printf("Today is Thursday");
case  5:
printf("Today is Friday");
case  6:
printf("Today is Saturday");
case  7:
printf("Today is Sunday");
default:
printf("Only enter value 1 to 7");
}
getch();
}

Output

    Enter any number (1 to 7): 4 Today is Thursday Today is Friday Today is Saturday Today is Sunday

Example 4: calculator Program

 #include<stdio.h>
#include<conio.h>

void main()
{
char choice;
int a,b,res=0;
clrscr();
printf("Enter first value: ");
scanf("%d",&a);
printf("\n Enter operator: ");
choice=getch();
printf("\n Enter second value: ");
scanf("%d",&b);
switch(choice)
{
case '+':
  res=a+b;
  printf("Sum: %d",res);
break;
case '-':
  res=a-b;
  printf("Difference: %d",res);
break;
case '*':
  res=a*b;
  printf("Product: %d",res);
break;
case '/':
  res=a/b;
  printf("Quotient: %d",res);
break;
default:
  printf("Enter Valid Operator!!");
}
getch();
}

Output

 Enter First number: 6
Enter operator : +
Enter Second number: 10
Sum: 16

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Switch statement in C

Example 1:

Example 2:

Example 3:

Example 4: calculator Program