Ruby BigDecimal truncate()函数

BigDecimal#truncate() : truncate()是BigDecimal类的一个方法，通过截断到最接近的整数（默认情况下）来返回大十进制。

语法。BigDecimal.truncate()

参数。大十进制的值

返回：通过截断到最接近的整数来返回大十进制（默认情况下）。

例子 #1 :

# Ruby code for BigDecimal.truncate() method
   
# loading library
require 'bigdecimal'
require 'bigdecimal/util'
   
# declaring bigdecimal
a = BigDecimal("10")
   
# declaring bigdecimal
b = -BigDecimal("10")
   
# declaring bigdecimal
c = -BigDecimal("11.43")
   
# truncate() method
puts "BigDecimal a truncate method : #{a.truncate()}\n\n"
   
puts "BigDecimal b truncate method : #{b.truncate()}\n\n"
   
puts "BigDecimal c truncate method : #{c.truncate()}\n\n"

输出:

BigDecimal a truncate method : 10

BigDecimal b truncate method : -10

BigDecimal c truncate method : -11

例子 #2 :

# Ruby code for BigDecimal.truncate() 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')
   
# truncate() method
puts "BigDecimal a truncate method : #{a.truncate()}\n\n"
   
puts "BigDecimal b truncate method : #{b.truncate()}\n\n"
   
puts "BigDecimal c truncate method : #{c.truncate()}\n\n"

输出:

BigDecimal a truncate method : 144

BigDecimal b truncate method : -205121100730586399999999999999999999999999999999999999999999999999999999999999999999999999999990

BigDecimal c truncate method : -3