🚀 Programming Example

Example 3: Double Array: Write a Java program to update array elements at three different positions: start, middle, and end. Provide 3 different examples using user input for double arrays.

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💻 Practical Program

📘 Step Learning

Learn this program step-by-step with algorithm, source code, output and detailed explanation.

📌 Information & Algorithm

Example 3: Double Array

💻 Program Code

import java.util.Scanner;

public class UpdateDoubleArrayUser {
    public static void main(String[] args) {
        Scanner sc = new Scanner(System.in);
        double[] arr = {1.1, 2.2, 3.3, 4.4, 5.5, 6.6};

        System.out.println("Original Array:");
        for(double num : arr){
            System.out.print(num + " ");
        }

        // User input to update start, middle, and end
        System.out.print("\nEnter new value for start: ");
        arr[0] = sc.nextDouble();

        System.out.print("Enter new value for middle: ");
        arr[arr.length / 2] = sc.nextDouble();

        System.out.print("Enter new value for end: ");
        arr[arr.length - 1] = sc.nextDouble();

        System.out.println("Updated Array:");
        for(double num : arr){
            System.out.print(num + " ");
        }
    }
}

🎯 How to learn from this example

First understand the algorithm carefully. Then study the program line-by-line and compare it with the output. Finally, review the explanation section to strengthen your logic and programming understanding.

🔥 Practice suggestion

Rewrite the program without looking at the code. Modify values, conditions or logic and run it again. This helps improve confidence and strengthens coding skills much faster.

⚡ Quick Practice Flow

Follow this learning sequence for better understanding.

Read the topic carefully
Understand the algorithm
Study the code line-by-line
Check the output result
Practice by modifying logic