Java Program to Print Square of Given Array Elements

Introduction

This guide will explore the process of creating a Java program that effectively calculates and prints the squares of elements within a given array. We’ll delve into the code structure, logic, and key steps involved in implementing this task.

Key Concepts

• Arrays in Java: Arrays are fundamental data structures that store a fixed-size sequential collection of elements of the same data type.
• Looping: Iteration over array elements is crucial for accessing and manipulating individual values.
• Mathematical Operations: The square of a number is calculated by multiplying it by itself.

Steps to Implement

1. Import Necessary Class:

Java

import java.util.Arrays;  // For array manipulation

2. Declare Array and Variables:

Java

int[] numbers = {1, 2, 3, 4, 5};  // Example array
int[] squares = new int[numbers.length];  // Array to store squares

3. Calculate Squares Using a Loop:

Java

for (int i = 0; i < numbers.length; i++) {
    squares[i] = numbers[i] * numbers[i];  // Calculate square and store
}

4. Print the Squares:

Java

System.out.println("Original Array: " + Arrays.toString(numbers));
System.out.println("Squares of Array Elements: " + Arrays.toString(squares));

Complete Example Code:

Java

import java.util.Arrays;

public class SquareArrayElements {
    public static void main(String[] args) {
        int[] numbers = {1, 2, 3, 4, 5};
        int[] squares = new int[numbers.length];

        for (int i = 0; i < numbers.length; i++) {
            squares[i] = numbers[i] * numbers[i];
        }

        System.out.println("Original Array: " + Arrays.toString(numbers));
        System.out.println("Squares of Array Elements: " + Arrays.toString(squares));
    }
}

Explanation

1. The import java.util.Arrays; statement enables the use of the Arrays class for array-related operations.
2. Two arrays are declared: numbers to store the original values and squares to store the calculated squares.
3. The for loop iterates through each element in the numbers array.
4. Inside the loop, the square of the current element is calculated and stored in the corresponding index of the squares array.
5. The Arrays.toString() method is used to print the arrays in a readable format.

Key Points to Remember

• The loop iterates through the array using the i variable as an index to access elements.
• The squares[i] = numbers[i] * numbers[i]; statement performs the squaring operation and stores the result.
• Ensure that the squares array has the same length as the numbers array to avoid index-out-of-bounds errors.