Program to copy all elements of an array into another array

Here we will learn how to write a program to copy all elements of an array into another array using different programming languages like CC#PythonJava, and PHP.

program-to-copy-all-the-elements-of-one-array-into-another-array
Program to copy all the elements of an array into another array

Copying all elements from one array into another is a common programming task.

Let’s take a look at some examples in different programming languages to understand how to copy all elements from one array to another.

C# Example:

using System;

class Program
{
    static void Main()
    {
        // Declare and initialize the first array
        int[] arr1 = {1, 2, 3, 4, 5};

        // Declare and initialize the second array with the same length as the first array
        int[] arr2 = new int[arr1.Length];

        // Copy all elements of arr1 to arr2 using the Array.Copy() method
        Array.Copy(arr1, arr2, arr1.Length);

        // Print the elements of the first array
        Console.WriteLine("Elements of first array:");
        foreach (int i in arr1)
        {
            Console.Write(i + " ");
        }

        // Print the elements of the second array
        Console.WriteLine("\nElements of second array:");
        foreach (int i in arr2)
        {
            Console.Write(i + " ");
        }
    }
}

Output:

Elements of first array:
1 2 3 4 5
Elements of second array:
1 2 3 4 5

Explanation:

In this example, we create two integer arrays – arr1 and arr2. We use the Array.Copy() method to copy all elements from arr1 to arr2. Finally, we print the elements of both arrays using a loop.

Python Example:

Here is an example of how to copy all elements of one Array into another array using Python.

# create a list named arr1 with some elements
arr1 = [1, 2, 3, 4, 5]

# use the copy() method to copy all elements from arr1 to arr2
arr2 = arr1.copy()

# print the elements of arr1 using a for loop
print("Elements of first array:")
for i in arr1:
    print(i, end=' ')

# print the elements of arr2 using a for loop
print("\nElements of second array:")
for i in arr2:
    print(i, end=' ')

Output:

Elements of first array:
1 2 3 4 5
Elements of second array:
1 2 3 4 5

In the above example, we create a list named arr1 with five elements. We use the copy() method to create a new list named arr2 and copy all elements from arr1 to arr2.
Then, we print the elements of both lists using for loops. The end parameter of the print() function is set to a space, so the elements are printed in a single line separated by spaces.

C Example:

Here is an example of how to copy all elements of an array into another array using C programming.

#include <stdio.h>

void main()
{
    int arr1[] = {1, 2, 3, 4, 5};
    int arr2[5];

    for(int i=0; i<5; i++)
    {
        arr2[i] = arr1[i];
    }

    printf("Elements of first array:\n");
    for(int i=0; i<5; i++)
    {
        printf("%d ", arr1[i]);
    }

    printf("\nElements of second array:\n");
    for(int i=0; i<5; i++)
    {
        printf("%d ", arr2[i]);
    }
}

Java Example:

Here is an example of how to copy all elements of one array into another array using Java.

public class Main
{
    public static void main(String[] args)
    {
        // Create an integer array called "arr1" with initial values
        int[] arr1 = {1, 2, 3, 4, 5};
        
        // Create a new integer array called "arr2" with the same length as "arr1"
        int[] arr2 = new int[arr1.length];

        // Copy all the elements from "arr1" to "arr2"
        
        System.arraycopy(arr1, 0, arr2, 0, arr1.length);

        // Print the elements of "arr1"
        System.out.println("Elements of first array:");
        for(int i=0; i<arr1.length; i++)
        {
            System.out.print(arr1[i] + " ");
        }

        // Print the elements of "arr2"
        System.out.println("\nElements of second array:");
        for(int i=0; i<arr2.length; i++)
        {
            System.out.print(arr2[i] + " ");
        }
    }
}

Output:

Elements of first array:
1 2 3 4 5
Elements of second array:
1 2 3 4 5

In this code, we create two integer arrays – arr1 and arr2. We use the System.arraycopy() method to copy all elements from arr1 to arr2. Finally, we print the elements of both arrays using a for loop.

PHP Example:

Here is an example of how to copy all elements of one array into another array using PHP.

<?php
// Initialize the first array with some elements
$arr1 = array(1, 2, 3, 4, 5);

// Initialize an empty second array
$arr2 = array();

// Loop through each element of the first array
foreach($arr1 as $value)
{
    // Add the current element to the second array using the array_push() function
    array_push($arr2, $value);
}

// Print the elements of the first array
echo "Elements of first array:\n";
foreach($arr1 as $value)
{
    echo $value . " ";
}

// Print the elements of the second array
echo "\nElements of second array:\n";
foreach($arr2 as $value)
{
    echo $value . " ";
}
?>

Output:

Elements of first array:
1 2 3 4 5
Elements of second array:
1 2 3 4 5

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