Python math.isclose() Method

Example

Check whether two values are close to each other, or not:

#Import math Library
import math

#compare the closeness of two values
print(math.isclose(1.233, 1.4566))
print(math.isclose(1.233, 1.233))
print(math.isclose(1.233, 1.24))
print(math.isclose(1.233, 1.233000001))

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Definition and Usage

The math.isclose() method checks whether two values are close to each other, or not. Returns True if the values are close, otherwise False.

This method uses a relative or absolute tolerance, to see if the values are close.

Tip: It uses the following formula to compare the values: abs(a-b) <= max(rel_tol * max(abs(a), abs(b)), abs_tol)

Syntax

math.isclose(a, b, rel_tol, abs_tol)

Parameter Values

Parameter	Description
a	Required. The first value to check for closeness
b	Required. The second value to check for closeness
rel_tol = value	Optional. The relative tolerance. It is the maximum allowed difference between value a and b. Default value is 1e-09
abs_tol = value	Optional. The minimum absolute tolerance. It is used to compare values near 0. The value must be at least 0

Technical Details

Return Value:	A `bool` value. `True` if the values are close, otherwise `False`
Python Version:	3.5

More Examples

Example

Use absolute tolerance:

#Import math Library
import math

#compare the closeness of two values
print(math.isclose(8.005, 8.450, abs_tol = 0.4))
print(math.isclose(8.005, 8.450, abs_tol = 0.5))

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❮ Math Methods