Table of Contents

Overview

math package of go provides a Floor method that can be used to get the ceil of a number. Floor of a number is the greatest integer value less than or equal to that number.

Below is the signature of the function. It takes input a float and also returns a float.

func Floor(x float64) float64

Some special cases of floor function are

Floor(±0) = ±0
Floor(±Inf) = ±Inf
Floor(NaN) = NaN

Code:

package main
import (
"fmt"
"math"
)
func main() {
res := math.Floor(1.6)
fmt.Println(res)
res = math.Floor(-1.6)
fmt.Println(res)
res = math.Floor(1)
fmt.Println(res)
}

Output:

1
-2
1

number