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: Display Three Numbers in Descending Order

20. Write a program in Java to read three integers and display them in descending order.

Java

import java.util.Scanner;
 
public class DescendingOrder {
    public static void main(String[] args) {
        Scanner sc = new Scanner(System.in);
 
        // Input three numbers
        System.out.print("Enter first number: ");
        int a = sc.nextInt();
 
        System.out.print("Enter second number: ");
        int b = sc.nextInt();
 
        System.out.print("Enter third number: ");
        int c = sc.nextInt();
 
        // Sorting in descending order using comparisons
        int largest, middle, smallest;
 
        if (a >= b && a >= c) {
            largest = a;
            if (b >= c) {
                middle = b;
                smallest = c;
            } else {
                middle = c;
                smallest = b;
            }
        } else if (b >= a && b >= c) {
            largest = b;
            if (a >= c) {
                middle = a;
                smallest = c;
            } else {
                middle = c;
                smallest = a;
            }
        } else {
            largest = c;
            if (a >= b) {
                middle = a;
                smallest = b;
            } else {
                middle = b;
                smallest = a;
            }
        }
 
        // Output
        System.out.println("Numbers in descending order:");
        System.out.println(largest + " " + middle + " " + smallest);
 
        sc.close();
    }
}

Output

Sample Input 
Enter first number: 45
Enter second number: 12
Enter third number: 78

Sample Output 
Numbers in descending order:
78 45 12

Explanation

The program reads three integers using the Scanner class.
Conditional statements (if-else) are used to:

Find the largest, middle, and smallest numbers.

The numbers are then printed in descending order (largest → smallest).