The 'not' operator is a operator used to negate a comparison.

The comparison operator '!=' is used to check if two values are .

Relational operators are used to compare and determine the relationship between them.

The comparison operator '<' is used to check if the left value is the right value.

The comparison operator '>' is used to check if the left value is the right value.

The relational operator is used to check if two values are not equal.

The comparison operator '==' is used to check if two values are .