Logical NOT results in a true if the operand is false and vice versa.
This operator can be used inside the condition of an if statement.
It can be used to invert the boolean value.
※ NOTES AND WARNINGS:
The bitwise not ~ (tilde) looks much different than the boolean not ! (exclamation point or "bang" as the programmers say) but you still have to be sure which one you want where.