Lua:四舍五入数字然后截断 [英] Lua: Rounding numbers and then truncate

问题描述

四舍五入然后截断它(四舍五入后去除小数位)的最有效方法是什么?

Which is the best efficient way to round up a number and then truncate it (remove decimal places after rounding up)?

例如，如果小数大于 0.5(即 0.6、0.7 等)，我想向上舍入然后截断(情况 1).否则，我想截断(案例 2)

for example if decimal is above 0.5 (that is, 0.6, 0.7, and so on), I want to round up and then truncate (case 1). Otherwise, I would like to truncate (case 2)

for example:
232.98266601563 => after rounding and truncate = 233 (case 1)
232.49445450000 => after rounding and truncate = 232 (case 2)
232.50000000000 => after rounding and truncate = 232 (case 2)

推荐答案

Lua 中没有内置 math.round() 函数，但您可以执行以下操作:print(math.floor(a+0.5)).

There is no build-in math.round() function in Lua, but you can do the following: print(math.floor(a+0.5)).

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