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

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.

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

The relational operator is used to check if one value is less than another.

The 'and' operator is a operator used for more complex comparisons.