Finding the Integer Value of Specified Number in Golang

Last Updated : 13 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 can find the integer value of the specified number with the help of Trunc() 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 Trunc() function.

Syntax:

 func Trunc(a float64) float64

If you pass -Inf or +Inf in this function like Trunc(-Inf) or Trunc(+Inf), then this function will return -Inf or +Inf.
If you pass -0 or +0 in this function like Trunc(-0) or Trunc(+0), then this function will return -0 or +0.
If you pass NaN in this function like Trunc(NaN), then this function will return NaN.

Example 1:

// Golang program to illustrate how to
// get the integer value of the given numbers
  
package main
  
import (
    "fmt"
    "math"
)
  
// Main function
func main() {
  
    // Finding the integer 
    // value of the given numbers
    // Using Trunc() function
    res_1 := math.Trunc(45.98)
    res_2 := math.Trunc(-119.98)
    res_3 := math.Trunc(math.Inf(-1))
    res_4 := math.Trunc(math.NaN())
    res_5 := math.Trunc(math.Pi)
  
    // Displaying the result
    fmt.Printf("Result 1: %.1f", res_1)
    fmt.Printf("\nResult 2: %.1f", res_2)
    fmt.Printf("\nResult 3: %.1f", res_3)
    fmt.Printf("\nResult 4: %.1f", res_4)
    fmt.Printf("\nResult 5: %.1f", res_5)
  
}

Output:

Result 1: 45.0
Result 2: -119.0
Result 3: -Inf
Result 4: NaN
Result 5: 3.0

Example 2:

// Golang program to illustrate how to get
// the integer value of the given numbers
  
package main
  
import (
    "fmt"
    "math"
)
  
// Main function
func main() {
  
    // Finding the integer value
    // of the given numbers
    // Using Trunc() function
    nvalue_1 := math.Trunc(59.89)
    nvalue_2 := math.Trunc(-7.567)
  
    // Sum of the given numbers
    res := nvalue_1 + nvalue_2
    fmt.Printf("%.2f + %.2f = %.2f",
           nvalue_1, nvalue_2, res)
  
}

Output:

59.00 + -7.00 = 52.00

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