红宝石 |数字 floor()函数
floor()是 Ruby 中的一个内置方法,它返回一个小于或等于给定数字的数字,其精度为小数点后给定的位数。如果未给出位数,则默认值为零。
Syntax: num.floor(ndigits)
Parameters: The function needs a number and ndigits which specifies the number of digits to be round off. If ndigits is not given then, default value is taken to be zero.
Return Value: It returns returns a boolean value.
示例 1 :
# Ruby program for floor()
# method in Numeric
# Initialize a number
num1 = -16.7834
num2 = -16.78324
num3 = 16.873
# Prints floor
puts num1.floor(1)
puts num2.floor()
puts num3.floor()
输出:
-16.8
-17
16
示例 2 :
# Ruby program for floor()
# method in Numeric
# Initialize a number
num1 = 12.32
num2 = -1321.998321
num3 = -12.2321
# Prints floor
puts num1.floor(1)
puts num2.floor(2)
puts num3.floor(3)
输出:
12.3
-1322.0
-12.233