Array in java

     Today we are discussing about array

Now what is array:

                              An array is a data structure, which can store a fixed-size collection of elements of the same data type. ... An array is used to store a collection of data, but it is often more useful to think of an array as a collection of variables of the same type.

we can declare the array in different way. In this blog we learning the major way to describe/declare  the array.

note: array start with the index of zero(0)

don't forget that  ( array=n-1)

now this blog is little bit long.

    

    package com.ritesh;

    public class arr {
     public static void main(String[] args) {
    arr_type1();
    arr_type2();
    }


    public  static  void arr_type1()
    {
        String [] arr={"Ram","Shyam","Hari","sita","gopi","katla","kalla katla","hurra hutti"};   //defining the array

    //System.out.println(arr[0]); //printing the array

    //printing the array using  for loop
    System.out.println("using for loop");
    System.out.println();
    for (String s : arr) {
        System.out.println(s);
    }
    System.out.println();

    //printing using while loop
    int p=0;
    System.out.println("using while loop");
    System.out.println();
    while (p<arr.length)
    {
        System.out.println(arr[p]);
        p++;

    }


    int x=0;
    System.out.println();
    System.out.println("using do while loop");
    do {
        System.out.println(arr[x]);


            x++;
    }
    while (x < arr.length);
}
public  static  void arr_type2()
{
    int []num=new int[5];
    num[0]=100;
    num[1]=200;
    num[2]=300;
    num[3]=400;
    num[4]=500;

    int sd=0;  //array start with the index of zero
    System.out.println();
    System.out.println("by the another type of array deceleration ");
    while(sd<num.length)
    {
        System.out.println(num[sd]);
        sd++;
     }
 }
 

}