Conditional Constructs in Java

Chapter 8

Conditional Constructs in Java

Class 10 - Logix Kips ICSE Computer Applications with BlueJ

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Java Program: Student Marks, Percentage and Grade Calculator

32. Write a Java program in which you input students name, class, roll number, and marks in 5 subjects. Find out the total marks, percentage, and grade according to the following table.

Percentage	Grade
>=90	A+
>=80 and <90	A
>=70 and <80	B+
> =60 and <70	B
>=50 and <60	C
>=40 and <50	D
<40	E

Java

import java.util.Scanner;
 
public class StudentResult {
    public static void main(String[] args) {
        Scanner sc = new Scanner(System.in);
 
        String name, studentClass, grade;
        int roll;
        int total = 0;
        double percentage;
 
        System.out.print("Enter Student Name: ");
        name = sc.nextLine();
 
        System.out.print("Enter Class: ");
        studentClass = sc.nextLine();
 
        System.out.print("Enter Roll Number: ");
        roll = sc.nextInt();
 
        System.out.println("Enter marks in 5 subjects:");
        for (int i = 1; i <= 5; i++) {
            System.out.print("Subject " + i + ": ");
            total += sc.nextInt();
        }
 
        percentage = total / 5.0;
 
        if (percentage >= 90)
            grade = "A+";
        else if (percentage >= 80)
            grade = "A";
        else if (percentage >= 70)
            grade = "B+";
        else if (percentage >= 60)
            grade = "B";
        else if (percentage >= 50)
            grade = "C";
        else if (percentage >= 40)
            grade = "D";
        else
            grade = "E";
 
        System.out.println("\n--- Student Result ---");
        System.out.println("Name       : " + name);
        System.out.println("Class      : " + studentClass);
        System.out.println("Roll No.   : " + roll);
        System.out.println("Total Marks: " + total);
        System.out.println("Percentage : " + percentage + "%");
        System.out.println("Grade      : " + grade);
 
        sc.close();
    }
}

Output

Sample Output 

Enter Student Name: Rahul Sharma
Enter Class: 10
Enter Roll Number: 15
Enter marks in 5 subjects:
Subject 1: 85
Subject 2: 90
Subject 3: 78
Subject 4: 88
Subject 5: 80

--- Student Result ---
Name       : Rahul Sharma
Class      : 10
Roll No.   : 15
Total Marks: 421
Percentage : 84.2%
Grade      : A

📝 Explanation

Uses Scanner class for input
Marks are summed using a loop
Percentage = Total ÷ 5
Grade assigned using if–else ladder
Output formatted like a marksheet