condition in in array(for loope)

I have a problem with condition with what should go into array.
Array(Student),i,n was declared as int , and it works perfect with numbers, but if I enter any letter or some other sign (, . ; : " ' etc.) the program does not goes to "goto" but just displays error message "You have entered invalid grade,\nplease enter value for the grade from the interval\nwich begins with 5 and ends with 10" and when I press any key the program just displays that message again and again.

Does anywhone knows how to fix this ?

Thank You for your patience.

code is

Code:

---

for(i=0;i<n;i++)
        {
       
TryAgain:printf("enter value for the %d grade : ",i+1);
                scanf("%d",&Student[i]);
                if(Student[i]<5||Student[i]>10)
                {
                        printf("You have entered invalid grade,\nplease enter value for the grade from the interval\nwich begins with 5 and ends with 10\n\n");
                        system("pause");
                        system("cls");
                        goto TryAgain;
                }

        }

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Never hurts to read the Cprogramming.com FAQ > How do I get a number from the user (C)

While goto is great for teaching programming ideals and constructs ie looping....C provides much cleaner/more maintainable constructs for such a thing. I would recommend asking whoever told you to use goto what other loop control constructs are available (for, do while, while etc..) and why they suggested you use goto to begin with.