How to use Array button

To use Array button

• Create an array of objects based on the current selection.
  

• The items in the Array Dimensions area will allow you to create one-, two-, or three-dimensional arrays
  

• Firstly, select the object.

• click on the array button

• or Choose tools>array

• then this will show the array window
  

• type in '180' into the textbox and click on the move button
  

• then click ok

- Then this will show five stars in the viewport.