//GRADE #include<stdio.h> int main() { int marks; printf("enter your marks"); scanf("%d", &marks); if (marks>=85 && marks<=100) { printf(" Grade A"); } else if (marks>=70 && marks<=84) { printf(" Grade B"); } else if (marks>=55 && marks<=69) { printf(" Grade C"); } else if (marks>=40 && marks<=54) { printf("Grade D"); } else if (marks>=0 && marks<40) { printf("Grade F"); } else { printf("invalid marks"); } return 0; }