Null

• Null is a placeholder value to represent "nothingness".

Warning

Arithmetic does not apply to Null. Cannot use Null with Number or String.

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Logical operators

Operator	Description
!	Not
==	Equal to
!=	Not equal to
and	And
or	Or

Info

• Logical operators are similar to that of Boolean.
• However, and and or will always return Null.

Warning

• Ordered comparisons such as > or < do not work for Null.

Example

REPL.IT

Code only

println null == null;   // true
println null != null;   // false
println null and null;  // null
println null or null ;  // null
println null == false;  // Error because Null cannot be compared with Boolean

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