A program to explain IF ELSE IF ladder

C Programming Language 020

The following code shows how to write a program to explain IF ELSE IF ladder.

Program

/**
 * Reade three subject marks of a student and find the average of the marks.
 * Decide the student's grade by rules given below.
 * 70 <= Average      - Grade A
 * 60 <= Average < 70 - Grade B
 * 50 <= Average < 60 - Grade C
 * 40 <= Average < 50 - Grade D
 *       Average < 40 - Fail
 */

#include <stdio.h>

void main()
{
    int sub1, sub2, sub3;
    float avg;

    printf("Enter 3 subject marks:\n");
    scanf("%d %d %d", &sub1, &sub2, &sub3);

    avg = (sub1 + sub2 + sub3) / 3.0;

    printf("Average = %f\n", avg);

    if (avg >= 70)
        printf("Grade A");
    else if (avg < 70 && avg >= 60)
        printf("Grade B");
    else if (avg < 60 && avg >= 50)
        printf("Grade C");
    else if (avg < 50 && avg >= 40)
        printf("Grade D");
    else
        printf("Fail");

    printf("\n");
}

Result

Enter 3 subject marks:
100 70 90
Average = 86.666664
Grade A

Last Updated on Sep 22, 2022