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简单介绍Python中的round()方法

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Release： 2016-06-10 15:12:33
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 round()方法返回 x 的小数点四舍五入到n个数字。
语法

以下是round()方法的语法：

round( x [, n] )
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参数

  • x --这是一个数值表达式
  • n --这也是一个数值表达式

返回值

该方法返回 x 的小数点四舍五入到n个数字
例子

下面的例子显示了round()方法的使用

#!/usr/bin/python

print "round(80.23456, 2) : ", round(80.23456, 2)
print "round(100.000056, 3) : ", round(100.000056, 3)
print "round(-100.000056, 3) : ", round(-100.000056, 3)
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当我们运行上面的程序，它会产生以下结果：

round(80.23456, 2) : 80.23
round(100.000056, 3) : 100.0
round(-100.000056, 3) : -100.0
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python
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