Comparison Operators

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Description

Used to compare expressions.

Syntax

result = expression1 comparisonoperator expression2

Comparison operators have these parts:

Part	Description
result	Any variable.
expression	Any expression.
comparisonoperator	Any comparison operator.
expression2	Any expression.

Remarks

The following table contains a list of the comparison operators and the conditions that determine whether result is True, False, or Null:

Operator	Description	True if	False if
<	Less than	expression1 < expression2	expression1 >= expression2
<=	Less than or equal to	expression1 <= expression2	expression1 > expression2
>	Greater than	expression1 > expression2	expression1 <= expression2
>=	Greater than or equal to	expression1 >= expression2	expression1 < expression2
==	Equal to	expression1 == expression2	expression1 != expression2
!=	Not equal to	expression1 != expression2	expression1 == expression2

When comparing two expressions, you may not be able to easily determine whether the expressions are being compared as numbers or as strings. The following table shows how expressions are compared or what results from the comparison, depending on the underlying subtype:

	obj	as	ns	num	bool	undef	null
obj	F	F	F	F	F	F	F
as	F	S	S	E	E	E	F
ns	F	S	S	N	N	E	F
num	F	E	N	N	N	E	T
bool	F	E	N	N	N	E	T
undef	F	E	E	E	E	E	T
null	F	F	F	T	T	T	T

obj = Object, as = Alphanumeric String, ns = Numeric String, num = Number, bool = Boolean, undef = Undefined, null = Null value.
F = false, T = true, S = string, N = numeric, E = error.