Program to fill array of elements from user using while loop in Java

Program to fill array of elements from user using while loop in Java

In this article, we will discuss the concept of Program to fill array of elements from user using while loop in Java

In this post, we are going to learn how to write a program to  input elements of an array using while loop in Java language

Code to take  array input from user

Code to take integer array input using while loop – #1

In this code, we are going to learn how to take input array of integer   using while loop in Java language

Program 1

import java.util.Scanner;
public class TakeArrayInputwhile{
public static void main(String args[]){
//scanner class object to read input
  Scanner sc=new Scanner(System.in);
  //Declaring and creating integer array
  int[] arr=new int[6];
  
  //Display default value before initialize
  System.out.println("Default value of integer array: ");
  int i=0;
  while(i<arr.length){
    System.out.println(arr[i]+"\t");
     i++;
  }
  System.out.println("");
  //initializing integer array
  System.out.println("******Initializing array******");
  System.out.println("Enter "+arr.length+" integer values");
  i=0; 
  while(i<arr.length){//initializing array elements using while loop
    arr[i]=sc.nextInt();
     i++;
  }
  
  //displaying the array values
  System.out.println("\n******displaying array elements******");
  System.out.println("Array elements are");
  i=0; 
  while(i<arr.length){//display array elements using while loop
    System.out.println(arr[i]+"\t");
     i++;
  }
}
}

When the above code is executed, it produces he following result

Default value of integer array:
0
0
0
0
0
0

"******Initializing array******"

Enter 6 integer values
321
432
543
654
765
876

******displaying array elements******

Array elements are
321
432
543
654
765
876

 

Code to take String array input using while loop – #2

In this code, we are going to learn how to take input array of Strings  using while loop in Java language

Program 2

import java.util.Scanner;
public class TakeStringArrayInputWhile{
public static void main(String args[]){
//scanner class to read input from the user
  Scanner sc=new Scanner(System.in);
  //Declaring and creating String array
  String[] arr=new String[4];
  
  //Display default value after declaring
  System.out.println("Default values of given String array: ");
  int i=0; 
  while(i<=arr.length-1){
    System.out.print(arr[i]+"\t");
    i++;
  }//find default value of the given array
   
  System.out.println("");
  //initializing value to the array
  System.out.println("******Initializing array******");
  System.out.println("Enter "+arr.length+" String values");
  i=0;
  while(i<=arr.length-1){
    arr[i]=sc.nextLine();
     i++;
  }//using the for loop to initializing array
  
  //displaying the array elements
  System.out.println("\n******displaying array elements******");
  System.out.println("Entered Strings are");
  i=0;
  while(i<=arr.length-1){
    System.out.print(arr[i]+"\t");
     i++;
  }
}
}

When the above code is executed, it produces he following result

Default value of given String array:
null    null    null    null

******Initializing array******
Enter 4 string values
Array
coding
for
while

******displaying array elements******
Entered Strings are
Array     coding      for      while

 

Code to take character array input using while loop – #3

In this code, we are going to learn how to take input array of characters   using while loop in Java language

Program 1

import java.util.Scanner;
public class TakeCharArrayInputwhile{
public static void main(String args[]){
//scanner object to read input from the user
  Scanner s=new Scanner(System.in);
  //Declaring and creating character array
  char[] a=new char[5];
  
  //initializing value to the array
  System.out.println("******Initializing array******");
  System.out.println("Enter characters");
  
  a=s.next().toCharArray();
    //Take character input from user

  
  //displaying the array elements
  System.out.println("\n******displaying array of characters******");
  System.out.println("Entered Characters are");
  int i=0;
  while(i<a.length){
    System.out.print(a[i]+"\t");
     i++;
  }
}
}

When the above code is executed, it produces he following result

******Initializing array******

Enter characters
Array

******displaying array of characters******
Entered Characters are
A    r    r    a    y

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