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Finding Error Function of Given Number in Golang

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  • Last Updated : 01 Apr, 2020
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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 error function of the specified number with the help of Erf() 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 Erf() function.

Syntax:

func Erf(a float64) float64
  • If you pass +Inf in this function, then this function will return 1.
  • If you pass -Inf in this function, then this function will return -1.
  • If you pass NaN in this function, then this function will return NaN.

Example 1:




// Golang program to illustrate how to find the
// error function of the given number
  
package main
  
import (
    "fmt"
    "math"
)
  
// Main function
func main() {
  
    // Finding error function
    // Using Erf() function
    res_1 := math.Erf(0.958)
    res_2 := math.Erf(math.Inf(-3))
    res_3 := math.Erf(math.Inf(3))
    res_4 := math.Erf(math.NaN())
  
    // 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)
  
}

Output:

Result 1: 0.8
Result 2: -1.0
Result 3: 1.0
Result 4: NaN

Example 2:




// Golang program to illustrate how to find the
// error function of the given number
  
package main
  
import (
    "fmt"
    "math"
)
  
// Main function
func main() {
  
    // Finding error function
    // Using Erf() function
    nvalue_1 := math.Erf(0.8457)
    nvalue_2 := math.Erf(4)
    res := nvalue_1 + nvalue_2
    fmt.Printf("%.1f + %.1f = %.1f",
            nvalue_1, nvalue_2, res)
  
}

Output:

0.8 + 1.0 = 1.8

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