红宝石 | BigDecimal to_f()函数
BigDecimal#to_f() : to_f()是一个 BigDecimal 类方法,它返回一个新的 Float 对象,该对象的值与 BigDecimal 数大致相同。
Syntax: BigDecimal.to_f()
Parameter: BigDecimal values
Return: a new Float object having approximately the same value as the BigDecimal number.
示例 #1:
# Ruby code for BigDecimal.to_f() method
# loading library
require 'bigdecimal'
require 'bigdecimal/util'
# declaring bigdecimal
a = BigDecimal("10")
# declaring bigdecimal
b = -BigDecimal("10")
# declaring bigdecimal
c = -BigDecimal("11.43")
# to_f() method
puts "BigDecimal a to_f method : #{a.to_f()}\n\n"
puts "BigDecimal b to_f method : #{b.to_f()}\n\n"
puts "BigDecimal c to_f method : #{c.to_f()}\n\n"
输出 :
BigDecimal a to_f method : 10.0
BigDecimal b to_f method : -10.0
BigDecimal c to_f method : -11.43
示例 #2:
# Ruby code for BigDecimal.to_f() method
# loading library
require 'bigdecimal'
require 'bigdecimal/util'
# declaring bigdecimal
a = BigDecimal('12')*12
# declaring bigdecimal
b = BigDecimal('10')-(22 ** 7.1) ** 10
# declaring bigdecimal
c = BigDecimal('-3')
# to_f() method
puts "BigDecimal a to_f method : #{a.to_f()}\n\n"
puts "BigDecimal b to_f method : #{b.to_f()}\n\n"
puts "BigDecimal c to_f method : #{c.to_f()}\n\n"
输出 :
BigDecimal a to_f method : 144.0
BigDecimal b to_f method : -2.051211007305864e+95
BigDecimal c to_f method : -3.0