try yourself |run program

#include <stdio.h> 
#include <conio.h> 
void main(){
 int dayNum;
 clrscr();
 printf("\n This is a ladder if() statement program.");
 printf("\n Enter number for day: ");
 scanf("%d",&dayNum);
 if( dayNum == 0){
 printf("\n SUNDAY ");
 }
 else if(dayNum==1){
 printf("\n MONDAY ");
 }
 else if(dayNum == 2){
 printf("\n TUESDAY ");
 }
 else if(dayNum == 3){
 printf("\n WEDNESDAY ");
 }
 else if(dayNum == 4){
 printf("\n THURSDAY ");
 }
 else if(dayNum == 5){
 printf("\n FRIDAY ");
 }
 else if(dayNum == 6){
 printf("\n SATURDAY ");
 }
 else{
 printf("\n please enter value between 0 to 6 ");
 }
 getch();
}

Program Output

This is a ladder if() statement program. 
Enter number for day: 5 
FRIDAY