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
from decimal import *
a = Decimal( '.9932' )
b = Decimal( '0.142857' )
print ( "Decimal value a : " , a)
print ( "Decimal value b : " , b)
print ( "\n\nDecimal a with ln() method : " , a.ln())
print ( "Decimal b with ln() method : " , b.ln())
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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
from decimal import *
a = Decimal( '3.14' )
b = Decimal( '321e + 5' )
print ( "Decimal value a : " , a)
print ( "Decimal value b : " , b)
print ( "\n\nDecimal a with ln() method : " , a.ln())
print ( "Decimal b with ln() method : " , b.ln())
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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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