Logical Operators

The logical operators, And, Or, and Not, are used to combine Boolean values. Analytica uses the values True = 1 and False = 0.

When applied to values other than 0 or 1, other parameter values are interpreted as follows:

• a non-zero numeric is treated as true
• NaN is treated as ambiguous (could be 0 or 1)
• Null results in a warning, with a Null result.
• Any other data type results in an error.

A And B

True if both «A» and «B» are true. False if either «A» or «B» is false.

In this table, «x» signifies a numeric value that is not equal to zero (and is not NaN).

And	0	x	NaN	Null
0	0	0	0	Null
x	0	1	NaN	Null
NaN	0	NaN	NaN	Null
Null	Null	Null	Null	Null

A Or B

True if «A» or «B», or both, are true.

In this table, «x» signifies a numeric value that is not equal to zero (and is not NaN).

Or	0	x	NaN	Null
0	0	1	NaN	Null
x	1	1	1	Null
NaN	NaN	1	NaN	Null
Null	Null	Null	Null	Null

Not A

True if «A» is false.

Not	0	x	NaN	Null
	1	0	NaN	Null

See Also

• INF, NAN, Null, and Undefined