Java (programming language)

# 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**

**Import Necessary Class:**

Java

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

**Declare Array and Variables:**

Java

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

**Calculate Squares Using a Loop:**

Java

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

**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**

- The
`import java.util.Arrays;`

statement enables the use of the`Arrays`

class for array-related operations. - Two arrays are declared:
`numbers`

to store the original values and`squares`

to store the calculated squares. - The
`for`

loop iterates through each element in the`numbers`

array. - Inside the loop, the square of the current element is calculated and stored in the corresponding index of the
`squares`

array. - 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.