Ruby BigDecimal E()函数
BigDecimal#E() :E()是BigDecimal类的一个方法,用于返回精度为指定位数的正切值,数值。
语法。BigDecimal.E()
参数。BigDecimal的值
返回:以指定精度的数字为单位的正切值,数值。
例子 #1 :
# Ruby code for BigDecimal.E() method
# loading library
require 'bigdecimal'
require 'bigdecimal/util'
require "bigdecimal/math"
include BigMath
# declaring bigdecimal
a = BigMath.E(BigDecimal("10")).to_s
# declaring bigdecimal
b = BigMath.E(BigDecimal("032")).to_s
# declaring bigdecimal
c = BigMath.E(BigDecimal("1")).to_s
# E() method
puts "BigDecimal a E method : #{a}\n\n"
puts "BigDecimal b E method : #{b}\n\n"
puts "BigDecimal c E method : #{c}\n\n"
输出:
BigDecimal a E method : 0.2718281828E1
BigDecimal b E method : 0.27182818284590452353602874713527E1
BigDecimal c E method : 0.3E1
例子 #2 :
# Ruby code for BigDecimal.E() method
# loading library
require 'bigdecimal'
require 'bigdecimal/util'
require "bigdecimal/math"
include BigMath
# declaring bigdecimal
a = BigMath.E(BigDecimal("120")).to_s
# declaring bigdecimal
b = BigMath.E(BigDecimal("1.0")).to_s
# declaring bigdecimal
c = BigMath.E(BigDecimal("3")).to_s
# E() method
puts "BigDecimal a E method : #{a}\n\n"
puts "BigDecimal b E method : #{b}\n\n"
puts "BigDecimal c E method : #{c}\n\n"
输出:
BigDecimal a E method : 0.271828182845904523536028747135266249775724709369995957496696762772407663035354759457138217852516642742746639193200305992E1
BigDecimal b E method : 0.3E1
BigDecimal c E method : 0.272E1