isinf()

Definition

INT isinf ( <FLOAT number> )

Checks if a given value is an infinity. This function is the opposite of the finite() function.

It does not check for Not-A-Numbers. Use the isnan() function for that.

Parameters

• FLOAT number - The value to check.

Returns

INT : The result of the check

• 0 (false) - The value is a not an infinity.
• !0 (true) - The value is a positive or negative infinity.

See also

Wikipedia page about the mathematical subject infinity.