| // Copyright 2009 The Go Authors. All rights reserved. |
| // Use of this source code is governed by a BSD-style |
| // license that can be found in the LICENSE file. |
| |
| package math |
| |
| import "math" |
| |
| // Floor returns the greatest integer value less than or equal to x. |
| func Floor(x float64) float64 { |
| if x < 0 { |
| d, fract := Modf(-x); |
| if fract != 0.0 { |
| d = d+1; |
| } |
| return -d; |
| } |
| d, fract := Modf(x); |
| return d; |
| } |
| |
| // Ceil returns the least integer value greater than or equal to x. |
| func Ceil(x float64) float64 { |
| return -Floor(-x); |
| } |