When you create a new array of any of the following types you can leave the elements empty and populate them later:
All of the other types of arrays must be populated when you create them.
If you don't provide a specific value for an element, that element will be automatically populated with a default value.
For example, the default value for the elements of an array of type Number is 1.0.
The default value for the elements of an array of type Boolean is true.