isnan ("is not a number")

Synopsis

bool isnan(float value)

Returns

true if value is not a number, false otherwise.

This function checks if value is not a number.

Related

Examples

example.1
	isnan(1)
	# result = false	

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

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

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