Python math.log1p() Method

Python math 模块Python math Module

Python math.log1p(x)The method returns the natural logarithm of 1+x (base e).

Syntax

The syntax of the math.log1p() method is as follows:

math.log1p(x)

Parameter Description:

  • x-- Required, a number. If x is not a number, TypeError is returned. If the value is 0 or negative, ValueError is returned.

Return Value

Returns a float, representing the natural logarithm of 1+x to base e.

Example

The following example returns the natural logarithm of 1+x to base e:

Example

# Import the math package
import math

# Output the natural logarithm of 1+x to base e
print(math.log1p(2.7183))
print(math.log1p(2))
print(math.log1p(1))

Output result:

1.313266574586334
1.0986122886681098
0.6931471805599453

Python math 模块Python math Module

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