=, use for assignment==, try to avoid it, it is used in conditionals where java tries to automatically convert data types;===, equality;!==, non-equality;
The best practice here is to always use the identically equal operator
which is === or identically non-equal operator !==, since those
will give us false if we are comparing different data types.
Be aware that == usage can lead to logic errors or errors difficult
to debug, since for == 1 == "1" returns true.