Pattern Programs

Java Programs

Share with a Friend

Student Marks → Grade using nested switch - Java Program

Java

import java.util.Scanner;
 
public class NestedSwitchGrade {
    public static void main(String[] args) {
 
        Scanner sc = new Scanner(System.in);
 
        System.out.print("Enter marks (0–100): ");
        int marks = sc.nextInt();
 
        // Outer switch: derive grade category (0–9)
        int gradeCategory = marks / 10; 
 
        switch (gradeCategory) {
 
            case 10:  // 100 marks falls here
            case 9:
                // Nested switch for 90–100
                switch (gradeCategory) {
                    case 10:
                    case 9:
                        System.out.println("Grade: A");
                        break;
                }
                break;
 
            case 8:
                // Nested switch for 80–89
                switch (gradeCategory) {
                    case 8:
                        System.out.println("Grade: B");
                        break;
                }
                break;
 
            case 7:
                // Nested switch for 70–79
                switch (gradeCategory) {
                    case 7:
                        System.out.println("Grade: C");
                        break;
                }
                break;
 
            case 6:
                // Nested switch for 60–69
                switch (gradeCategory) {
                    case 6:
                        System.out.println("Grade: D");
                        break;
                }
                break;
 
            case 5:
                // Nested switch for 50–59
                switch (gradeCategory) {
                    case 5:
                        System.out.println("Grade: E");
                        break;
                }
                break;
 
            default:
                // Nested switch for <50
                switch (gradeCategory) {
                    default:
                        System.out.println("Grade: F (Fail)");
                }
        }
 
        sc.close();
    }
}

Output

 
OUTPUT 1:
Enter marks (0–100): 92
Grade: A 

OUTPUT 2:
Enter marks (0–100): 76
Grade: C

OUTPUT 3: 
Enter marks (0–100): 45
Grade: F (Fail)

Explanation

✅ 1. int gradeCategory = marks / 10;

Converts marks to a group:

90–100 → 9 or 10
80–89 → 8
70–79 → 7
60–69 → 6
50–59 → 5
Below 50 → (0–4)

✅ 2. Outer switch(gradeCategory)

Decides the range of grade.

✅ 3. Nested switch inside each case

The inner switch determines the final grade output.

✅ Why nested switch?

Demonstrates switch inside another switch.
Good example for teaching nested decision structures.

Java Programs

Share with a Friend

Introduction to Java

Student Marks → Grade using nested switch - Java Program

Output

Explanation