isnan function

Syntax

• bool isnan(value)
• bool[] isnan(values)

Parameters

1. value—float
2. values—float[]

Returns

True if value is not a number, false otherwise.

For an array values a new array is returned containing the result of each element.

Related

• isinf function
• isNull function

Examples

isnan(1)
# result = false

isnan(ln(-1))
# result = true

isnan(float("a"))
# result = true

isnan([1, ln(-1)])
# result = [false, true]