Java || Snippet – How To Input Numbers Into An Integer Array & Display Its Contents Back To User

November 20, 2012 admin No comments

This snippet demonstrates how to place numbers into an integer array. It also shows how to display the contents of the array back to the user via stdout.

REQUIRED KNOWLEDGE FOR THIS SNIPPET

Integer Arrays For Loops Final Variables





		
		
			Insert & Display Items In An Array
			
Java
			
			import java.util.Scanner;

public class ArrayInput
{
	// global variable declaration
	static Scanner cin = new Scanner(System.in);	
	final static int ARRAY_SIZE = 100; // const int allocating space for the array
	
	public static void main(String[] args)
	{
		// declare & initialize variables
		int numElems = 0;
		int[] myArray = new int[ARRAY_SIZE]; // declare array which has the ability to hold 100 elements
	     
		System.out.println("Welcome to My Programming Notes' Java Program.n");	
		
		// ask user how many items they want to place in array
		System.out.print("How many items do you want to place into the array?: ");
		numElems = cin.nextInt();
		
		System.out.println("");		
		// user enters data into array using a for loop
		// you can also use a while loop, but for loops are more common
		// when dealing with arrays
		for(int index=0; index < numElems; ++index)
		{
			System.out.print("Enter item #"+(index+1)+": ");
			myArray[index] = cin.nextInt();
		} 
		
		// display data to user
		System.out.print("nThe current items inside the array are: ");
		
		// display contents inside array using a for loop
		for(int index=0; index < numElems; ++index)
		{
			System.out.print("nItem #"+(index+1)+": "+myArray[index]);
		}
		System.out.println("");		
	}// end of main	
}// http://programmingnotes.org/
			
				
					
				
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						import java.util.Scanner;
 
public class ArrayInput
{
	// global variable declaration
	static Scanner cin = new Scanner(System.in);	
	final static int ARRAY_SIZE = 100; // const int allocating space for the array
	
	public static void main(String[] args)
	{
		// declare & initialize variables
		int numElems = 0;
		int[] myArray = new int[ARRAY_SIZE]; // declare array which has the ability to hold 100 elements
	     
		System.out.println("Welcome to My Programming Notes' Java Program.n");	
		
		// ask user how many items they want to place in array
		System.out.print("How many items do you want to place into the array?: ");
		numElems = cin.nextInt();
		
		System.out.println("");		
		// user enters data into array using a for loop
		// you can also use a while loop, but for loops are more common
		// when dealing with arrays
		for(int index=0; index < numElems; ++index)
		{
			System.out.print("Enter item #"+(index+1)+": ");
			myArray[index] = cin.nextInt();
		} 
		
		// display data to user
		System.out.print("nThe current items inside the array are: ");
		
		// display contents inside array using a for loop
		for(int index=0; index < numElems; ++index)
		{
			System.out.print("nItem #"+(index+1)+": "+myArray[index]);
		}
		System.out.println("");		
	}// end of main	
}// http://programmingnotes.org/

QUICK NOTES:
The highlighted lines are sections of interest to look out for.

The code is heavily commented, so no further insight is necessary. If you have any questions, feel free to leave a comment below.

Once compiled, you should get this as your output

Welcome to My Programming Notes' Java Program.
How many items do you want to place into the array?: 5 Enter item #1: 12 Enter item #2: 43 Enter item #3: 5 Enter item #4: 643 Enter item #5: 2321
The current items inside the array are: Item #1: 12 Item #2: 43 Item #3: 5 Item #4: 643 Item #5: 2321

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Posted in: Console, Getting Started, Java, Java, Java, Snippets Tags: array, for loop, java

Java || Snippet – How To Input Numbers Into An Integer Array & Display Its Contents Back To User

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