# Python | Decimal ln() method

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

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