isnan function

Syntax

• bool isnan(float value)

Returns

True if value is not a number, false otherwise.

Description

The isnan function checks if value is not a number.

Related

• isinf function

Examples

example.1
	isnan(1)
	# result = false

example.2
	isnan(ln(-1))
	# result = true

example.3
	isnan(float("a"))
	# result = true