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++ Unary increment: this operator only takes one operand. The operand's
value is increased by 1. The value returned depends on whether the ++
operator is placed before or after the operand; e.g. ++x will return the
value of x following the increment whereas x++ will return the value of x
prior to the increment.
-- Unary decrement: this operator only takes one operand. The operand's
value is decreased by 1. The value returned depends on whether the --
operator is placed before or after the operand; e.g. --x will return the
value of x following the decrement whereas x-- will return the value of x
prior to the decrement.
- Unary negation: returns the negation of operand.

Comparison
A comparison operator compares its operands and returns a logical value based on whether
the comparison is true or not. The operands can be numerical or string values. When used
on string values, the comparisons are based on the standard lexicographical (alphabetic)
ordering.

== "Equal to" returns true if operands are equal.
!= "Not equal to" returns true if operands are not equal.
> "Greater than" returns true if left operand is greater than right operand.
"Greater than or equal to" returns true if left operand is greater than or
>=
equal to right operand.
< "Less than" returns true if left operand is less than right operand.
<= "Less than or equal to" returns true if

Boolean
Boolean operators are typically used to combine multiple comparisons into one conditional
expression. For example, you might want to test two different computations: for example,
(24 * i) and (12 + p + 3). A boolean operator takes two operands, each of which has a true
or false value, and returns a true or false result.

&& "And" returns true if both operands are true.
|| "Or" returns true if either operand is true.
"Not" returns true if the negation of the operand is true (e.g. the operand is
!
false).
"Greater than or equal to" returns true if left operand is greater than or
>=
equal to right operand.
< "Less than" returns true if left operand is less than right operand.
"Less than or equal to" returns true if left operand is less than or equal to
<=
right operand

Assignment
The assignment operator (=) lets you assign a value to a variable. You can assign any value
to a variable, including another variable (whose value will be assigned). Several shorthand
assignment operators allow you to perform an operation and assign its result to a variable
in one step.

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