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Ruby | BigDecimal log() function

  • Last Updated : 06 Dec, 2019

BigDecimal#log() : log() is a BigDecimal class method which returns the natural logarithm of decimal to the specified number of digits of precision, numeric.

Syntax: BigDecimal.log()

Parameter: BigDecimal values

Return: the natural logarithm of decimal to the specified number of digits of precision, numeric.

Example #1 :






# Ruby code for BigDecimal.log() method
  
# loading library
require 'bigdecimal'
  
# declaring bigdecimal
a = BigDecimal("10")
  
# declaring bigdecimal
b = BigDecimal("1000") *2
  
# declaring bigdecimal
c = BigDecimal("11.43")
  
# log() method
puts "BigDecimal a log method : #{Math.log(a)}\n\n"
  
puts "BigDecimal b log method : #{Math.log(b)}\n\n"
  
puts "BigDecimal a log method : #{Math.log(c)}\n\n"

Output :

BigDecimal a log method : 2.302585092994046

BigDecimal b log method : 7.600902459542082

BigDecimal a log method : 2.4362414778067194

Example #2 :




# Ruby code for BigDecimal.log() method
  
# loading library
require 'bigdecimal'
  
# declaring bigdecimal
a = BigDecimal('12')*12
  
# declaring bigdecimal
b = BigDecimal('10')+(22 ** 7.1) ** 10
  
# declaring bigdecimal
c = -BigDecimal('-3')
  
# log() method
puts "BigDecimal a log method : #{Math.log(a)}\n\n"
  
puts "BigDecimal b log method : #{Math.log(b)}\n\n"
  
puts "BigDecimal a log method : #{Math.log(c)}\n\n"

Output :

BigDecimal a log method : 4.969813299576001

BigDecimal b log method : 219.46401418844042

BigDecimal a log method : 1.0986122886681098




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