Ruby Float ceil() 方法与示例
ceil()是一个浮点类方法，它返回传递的浮点值的 ceil 值。
Syntax: float.ceil()
Parameter: float value which is to get its ceil value
decimal digits (default = 0)
Return: smallest number >= to float with a ndigits decimal point precision.
For -ve precision : Integer with at least ndigits.abs trailing zeros.
For +ve precision : Floating point number.
示例 #1：
# Ruby code for ceil() method
# declaring float values
a = -56.23333333
# declaring float values
b = 56.784
# declaring float values
c = 222.8868686
# ceil value of a
puts "ceil value of a : #{a.ceil}\n\n"
# ceil value of b
puts "ceil value of b : #{b.ceil}\n\n"
# ceil value of c
puts "ceil value of c : #{c.ceil}\n\n"
输出 ：
ceil value of a : -56
ceil value of b : 57
ceil value of c : 223
示例 #2：
# Ruby code for ceil() method
# declaring float values
a = -0.78779393
# declaring float values
b = -50006.784 + 34
# declaring float values
c = 289 + 22.8868686
# ceil value of a
puts "ceil value of a : #{a.ceil}\n\n"
# ceil value of b
puts "ceil value of b : #{b.ceil}\n\n"
# ceil value of c
puts "ceil value of c : #{c.ceil}\n\n"
输出 ：
ceil value of a : 0
ceil value of b : -49972
ceil value of c : 312