1D Array Revision by java

Quickly, we will recap about 1D array and do some iterations on it

Declaration

DataType nameOfArray [] = new DataType [lengthOfArray];

Example
int array [] = new int [5];

If I want to access an element in array

ArrayName[index]

array[2];

Note that arrays is zero based:

Array of length 5
The 1st element in array[0]
The last element array[lengthOfArray-1] = array[4]

Example

int array [] = new int [5];
array [0] = 7;
array [1] = 23;
array [2] = 20;
array [3] = 17;
array [4] = 45;

System.out.println( array[0] ); // will print 7

looping on 1D array

For (int i=0 ; i<array.length();i++)
{
System.out.println(array[i] ) ;
}

Great questions need some one to solve

1st and easy question

2nd question and easy too

last one but is medium !