How to create and initialise array in java | codeYourslf

In this particular section we will Learn about array, in this article I have discussed how to create, initialise an array in java.

create/declare and initialise array in java 

How to create and initialise array in java | codeYourslf

Here you can learn data structures using java with lots of related programs. 

I mainly focus to practice different programs, as a result you can implement your own logic when you encountered with a new problem statement.

Learn DSA(Data Structures and Algorithms) using java :- 

In this particular section we will Learn about array, in this article I have discussed how to create, initialise an array in java.

Approach:-1 "Create and initialise array in java"

 import java.util.Scanner;

public class creatingArray {

    public static void main(String[] args){

      Scanner sc = new Scanner(System.in);

      System.out.println("Enter the size of array: ");

      int size = sc.nextInt();

      //initializing array

      int[] arr = new int[size];

      System.out.println("Enter the elements of the array: ");

      for(int i = 0; i < size; i++)

      {

        arr[i] = sc.nextInt();

      }

      

      System.out.println("The element of the array are: ");

      for(int i = 0; i < size; i++)

      {

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

      }

    }

}

 
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Explanation

In java we can declare an array like this

  • datatype[] arrayName; 

And to initialise the array, we have new operator. 

  • arrayName = new datatype[size]; 

By combining the above two statements, we can declare and initialise an array with a single line of code i.e 

  • datatype[] arrayName = new datatype[size] 

Let's see an example of integer array with size 5. 

  • int[] num = new int[5]; 

Here num is the name of the array.

Output

How to create and initialise array in java | codeYourslf

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