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Finding Floor Value of a Given Number in Golang
  • Last Updated : 01 Apr, 2020

Go language provides inbuilt support for basic constants and mathematical functions to perform operations on the numbers with the help of the math package. You are allowed to find the greatest integer value less than or equal to the specified number with the help of Floor() function provided by the math package. So, you need to add a math package in your program with the help of the import keyword to access the Floor() function.

Syntax:

func Floor(y float64) float64
  • If you pass +Inf or -Inf in this function, then this function will return +Inf or -Inf.
  • If you pass +0 or -0 in this function, then this function will return +0 or -0.
  • If you pass NaN in this function, then this function will return NaN.

Example 1:

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// Golang program to find out the floor value
  
package main
  
import (
    "fmt"
    "math"
)
  
// Main function
func main() {
  
    // Finding the greatest integer value 
    // less than or equal to the
    // specified number
    // Using Floor() function
    res_1 := math.Floor(4.7)
    res_2 := math.Floor(-8.976)
    res_3 := math.Floor(0.687997)
  
    // Displaying the result
    fmt.Printf("Result 1: %.1f", res_1)
    fmt.Printf("\nResult 2: %.1f", res_2)
    fmt.Printf("\nResult 3: %.1f", res_3)
  
}

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Output:

Result 1: 4.0
Result 2: -9.0
Result 3: 0.0

Example 2:

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// Golang program to find out the floor value
  
package main
  
import (
    "fmt"
    "math"
)
  
// Main function
func main() {
  
    // Finding the greatest integer value
    // less than or equal to the 
    // specified number
    // Using Floor() function
    nvalue_1 := 3.4556775
    nvalue_2 := 23.564646
    res := nvalue_1 + nvalue_2
    fmt.Printf("%.5f + %.5f = %.5f",
             nvalue_1, nvalue_2, res)
      
    fmt.Println("\nGreatest integer value: ",
                             math.Floor(res))
  
}

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Output:

3.45568 + 23.56465 = 27.02032
Greatest integer value:  27



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