Python math.isinf() Method

Example

Check whether a value is infinity or not:

# Import math Library
import math

# Check whether the values are infinite or not
print(math.isinf(56))
print(math.isinf(-45.34))
print(math.isinf(+45.34))
print(math.isinf(math.inf))
print(math.isinf(float("nan")))
print(math.isinf(float("inf")))
print(math.isinf(float("-inf")))
print(math.isinf(-math.inf))

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Definition and Usage

The math.isinf() method checks whether a number is infinite or not.

This method returns True if the specified number is a positive or negative infinity, otherwise it returns False.

Syntax

math.isinf(x)

Parameter Values

Parameter	Description
x	Required. The number to check

Technical Details

Return Value:	A `bool` value, True if x is a positive or negative infinity, False otherwise
Python Version:	2.6

❮ Math Methods