Java: Find the greatest of three numbers

Last update on May 14 2025 13:00:40 (UTC/GMT +8 hours)

Find Greatest Among Three Numbers

Write a Java program that takes three numbers from the user and prints the greatest number.

Test Data
Input the 1st number: 25
Input the 2nd number: 78
Input the 3rd number: 87

Pictorial Presentation:

Sample Solution:

Java Code:

import java.util.Scanner;
public class Exercise3 {

    
  public static void main(String[] args) {
  Scanner in = new Scanner(System.in);
   
  System.out.print("Input the 1st number: ");
  int num1 = in.nextInt();
   
  System.out.print("Input the 2nd number: ");
  int num2 = in.nextInt();
   
  System.out.print("Input the 3rd number: ");
  int num3 = in.nextInt();
   
   
  if (num1 > num2)
   if (num1 > num3)
    System.out.println("The greatest: " + num1);
   
  if (num2 > num1)
   if (num2 > num3)
    System.out.println("The greatest: " + num2);
   
  if (num3 > num1)
   if (num3 > num2)
    System.out.println("The greatest: " + num3);
 }
}

Sample Output:

Input the 1st number: 25                                                                                      
Input the 2nd number: 78                                                                                      
Input the 3rd number: 87                                                                                      
The greatest: 87

Flowchart:

For more Practice: Solve these Related Problems:

• Write a Java program to determine the greatest of three numbers using nested ternary operators without if-else constructs.
• Write a Java program to find the maximum among three numbers using an array and Java streams.
• Write a Java program to compare three numbers by sorting them with a custom comparator and then output the greatest.
• Write a Java program to read three numbers and use recursion to determine the maximum value.

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