try yourself |run program

#include <stdio.h> 
#include <conio.h> 
void main(){
 int dayNum;
 clrscr();
 printf("\n This is a switch statement program.");
 printf("\n Enter number for day: ");
 scanf("%d",&dayNum);
 switch( dayNum ){
 case 1:
 case 2:
 case 3:
 case 4:
 case 5:
 printf("\n Regular Days ");
 break;
 case 0:
 case 6:
 printf("\n Week end Days ");
 break;
 default:
 printf("\n Enter value between 0 to 6 ");
 break;
 }
 getch();
}

Program Output

This is a switch statement program.
Enter number for day: 2
Regular Days