C Program To Find A Grade Of Given Numbers Using Switch Case

#include<stdio.h>
int main()
{
   int marks;
   /*C Program to Find Grade of a Student Using Switch Case*/
   printf("\n-----------------------------------");
   printf("\nEnter The Marks Between 0 To 100:");
   printf("\nEnter The Mark: ");
   scanf("%d", &marks);
   if(marks>100)
   {
    /* Marks greater than 100 */
    printf("\nDon't Be Smart Enter your Marks Between Limit\n");
   }
   else
   {
   switch(marks/10)
   {
       case 10 :
       case 9 :
           /* Marks between 90-100 */
           printf("\n Your Grade is: A");
           break;
       case 8 :
            /* Marks between 80-89 */
           printf("\n Your Grade is: B" );
           break;
       case 7 :
           /* Marks between 70-79 */
           printf("\n Your Grade is: C" );
           break;
       case 6 :
           /* Marks between 60-69 */
           printf("\n Your Grade is: D" );
           break;
       case 5 :
            /* Marks between 50-59 */
           printf("\n Your Grade is: E" );
           break;
       case 4 :
           /* Marks between 40-59 */
           printf("\n Your Grade is: E--");
           break;
       default :
           /* Marks less than 40 */
           printf("\n You Grade is: F or Fail\n");
   }
 }
   getch();
   return 0;
}