Golang rounding up, rounding down, and rounding

This is a creation in Article, where the information may have evolved or changed.

I. Overview

The official math package provides the rounding method, rounding up math.Ceil() , rounding down math.Floor()

Second, usage

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Package Main Import ( "FMT" "Math" ) funcmain() { 1.1 Fmt. Println (Math. Ceil (x)) //2 Fmt. Println (Math. Floor (x)) //1 }

It is important to note that the complete return is not a real integer, but a float64 type, so int a manual conversion is required if the type is required.

2017-10-14 Append: A Wonderful rounding method

Golang no Python-like round () function, search a lot of it is very complex, and finally saw a fresh and refined: first +0.5, then take the whole down!

It's incredibly easy to think, and there's nothing wrong with that.

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funcroundfloat64) { return int 0/5)) }