try yourself |run program

#include <stdio.h>
#include <conio.h>
void main(){
 int a;
 clrscr();
 printf("Enter value of a: ");
 scanf("%d",&a); /*  & is used before variable name when you want to read data*/ 
 printf("\n value of a = %d",a); 
 getch(); 
}

Program Output

Enter value of a: 211 
value of a = 211