I. Overview
The official math package provides a rounding method, round up math.Ceil() , round downmath.Floor()
Two, usage
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package main
import (
"fmt"
"math"
)
func main(){
x := 1.1
fmt.Println(math.Ceil(x)) // 2
fmt.Println(math.Floor(x)) // 1
}
|
It should be noted that what is returned after the completion is not a real integer, but a float64 type, so if you need a int type, you need to convert it manually.
2017-10-14 Added: A wonderful rounding method
Golang does not have a python-like round() function. I searched a lot and it was very complicated. Finally I saw a fresh and refined one: first +0.5, then round down!
It is unbelievably simple, and there is nothing wrong with thinking about it. I admire this insight.
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func round(x float64){
return int(math.Floor(x + 0/5))
} |