Array in Java

Array in Java

Format for array

Int  Arrayname=new arraytype[size of array]

If your array is integer array then

Num=new int[10]

In above example array name is Num

Array type is int(other types float,String)

And array size is 10

We can also stored data directly in array

Format for this

Int arrayname[]={1,2,3,4,5}

Example:

class Array

{

    public static void main(String[] args)

    {

        int add=0,i;

        int number[]={1,2,3,4,5,6,7,8,9,10};

        for(i=0;i<10;i++)

        {

            add=add+number[i];

           

        }

        System.out.println(+add);

    }

}

Explenation of above example

•       class Array

        our class name is Array

•       public static void main(String[] args)

                declaration of  main mathod

•       int add=0,i;

          declare variables 'add'  and ' i'

          add=0 we initialize the value of 'add' variable equal to '0'

•         int number[]={1,2,3,4,5,6,7,8,9,10};

            here we initialize the array of size 10

            and having value 1,2,3,4,5,6,7,8,9,10 

always remember that memory aloccation in array is start from 0

means

number[0]=1;

at zero location 1 is presant in array

number[1]=2;

number[2]=3;

number[3]=4;

number[4]=5;

number[5]=6;

number[6]=7;

number[7]=8;

number[8]=9;

number[9]=10;

•       for(i=0;i<10;i++)

          its our for loop

          initialization of  i=0;

 then condition is check i<10;

0<10;

condition is true

then execution of boady of for loop

add=add+number[i];

here we have value of add=0;

number[i]=number[0]=1;

then add=0+1;

we get new value for add=1;

after this  increment of i is done by 1

this procedure is continue till for loop condition is false

System.out.println(+add); statement is executed and we

get add=55