5.Students grade

#include<stdio.h>
int main()
{
    int marks;
    printf("Enter the marks:");
    scanf("%d",&marks);
    if((marks>=80)&&(marks<=100))
        printf("A+",marks);

    else if((marks>=70)&&(marks<=79))

           printf("A",marks);

    else if((marks>=60)&&(marks<=69))

            printf("A-",marks);

    else if ((marks>=50)&&(marks<59))

            printf("B",marks);

    else if((marks>=40)&&(marks<=49))

             printf("B+");
    else
            printf(" F",marks);




return 0;
}