Question

Create an integer array A initialised with any numbers create another array V which has the square of the elements in A Display both the arrays​

Answer 1

Creating and Using Arrays

Here's a simple program, called ArrayDemo (in a .java source file), that creates the array, puts some values in it, and displays the values.

public class ArrayDemo {

public static void main(String[] args) {

int[] anArray; // declare an array of integers

anArray = new int[10]; // create an array of integers

// assign a value to each array element and print

for (int i = 0; i < anArray.length; i++) {

anArray[i] = i;

System.out.print(anArray[i] + " ");

}

System.out.println();

}

}

The output from this program is:

0 1 2 3 4 5 6 7 8 9

This section covers these topics:

Declaring a Variable to Refer to an Array

Creating an Array

Array Initializers

Accessing an Array Element

Getting the Size of an Array

Declaring a Variable to Refer to an Array

This line of code from the sample program declares an array variable:

int[] anArray; // declare an array of integers

Like declarations for variables of other types, an array declaration has two components: the array's type and the array's name. An array's type is written type[], where type is the data type of the elements contained within the array, and [] indicates that this is an array. Remember that all of the elements within an array are of the same type. The sample program uses int[], so the array called anArray will be used to hold integer data. Here are declarations for arrays that hold other types of data:

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