Related Articles

Python | Decimal ln() method

• Last Updated : 05 Sep, 2019

Decimal#ln() : ln() is a Decimal class method which returns the natural (base e) logarithm of the Decimal value.

Syntax: Decimal.ln()

Parameter: Decimal values

Return: the natural (base e) logarithm of the Decimal value.

Code #1 : Example for ln() method

 `# Python Program explaining ``# ln() method`` ` `# loading decimal library``from` `decimal ``import` `*`` ` ` ` `# Initializing a decimal value``a ``=` `Decimal(``'.9932'``)`` ` `b ``=` `Decimal(``'0.142857'``)`` ` `# printing Decimal values``print` `(``"Decimal value a : "``, a)``print` `(``"Decimal value b : "``, b)`` ` ` ` `# Using Decimal.ln() method``print` `(``"\n\nDecimal a with ln() method : "``, a.ln())`` ` `print` `(``"Decimal b with ln() method : "``, b.ln())`

Output :

```Decimal value a :  0.9932
Decimal value b :  0.142857

Decimal a with ln() method :  -0.006823225348125508334064182053
Decimal b with ln() method :  -1.945911149055813305438686327

```

Code #2 : Example for ln() method

 `# Python Program explaining ``# ln() method`` ` `# loading decimal library``from` `decimal ``import` `*`` ` ` ` `# Initializing a decimal value``a ``=` `Decimal(``'3.14'``)`` ` `b ``=` `Decimal(``'321e + 5'``)`` ` `# printing Decimal values``print` `(``"Decimal value a : "``, a)``print` `(``"Decimal value b : "``, b)`` ` ` ` `# Using Decimal.ln() method``print` `(``"\n\nDecimal a with ln() method : "``, a.ln())`` ` `print` `(``"Decimal b with ln() method : "``, b.ln())`

Output :

```Decimal value a :  3.14
Decimal value b :  3.21E+7

Decimal a with ln() method :  1.144222799920161998805694448
Decimal b with ln() method :  17.28436658810024428478960133
```

Attention geek! Strengthen your foundations with the Python Programming Foundation Course and learn the basics.

To begin with, your interview preparations Enhance your Data Structures concepts with the Python DS Course. And to begin with your Machine Learning Journey, join the Machine Learning – Basic Level Course

My Personal Notes arrow_drop_up