GradingSystem.c

/*This is a Program to check the grade of the students based on marks -

If marks <50 then Grade is F
if marks >=50 <60 then Grade is D
if marks >=60 <70 then Grade is C
if marks >=70 <80 then Grade is B
if marks >=80 <90 then Grade is A
if marks >=90 <=100 then Grade is A+
If marks are not in the above range then print “Invalid”  

*/

#include<stdio.h>
int main()
{
    int marks;
    printf("Enter your marks ");
    scanf("%d",&marks);
    
    if(marks<0 || marks>100)
    {
        printf("Invalid");
    }
    else if(marks<50)
    {
        printf("Grade F");
    }
    else if(marks>=50 && marks<60)
    {
        printf("Grade D");
    }
    else if(marks>=60 && marks<70)
    {
        printf("Grade C");
    }
    else if(marks>=70 && marks<80)
    {
        printf("Grade B");
    }
    else if(marks>=80 && marks<90)
    {
        printf("Grade A");
    }
    else
    {
        printf("Grade A+");
    }
    
    return 0;
}