Home » Golang » Golang Reference

Golang math.Exp2() Function with Examples

Golang | math.Exp2() Function: Here, we are going to learn about the Exp2() function of the math package with its usages, syntax, and examples.
Submitted by IncludeHelp, on August 30, 2021

math.Exp2()

The Exp2() function is an inbuilt function of the math package which is used to get the 2**x, the base-2 exponential of x, where x is the given parameter.

It accepts a parameter (x) and returns the 2**x, the base-2 exponential of x.

Syntax:

func Exp2(x float64) float64

Parameter(s):

• x : The value of float64 type whose base-2 is exponential to be found.

Return Value:

The return type of Exp2() function is a float64, it returns the 2**x, the base-2 exponential of x.

Special cases are:

• Exp2(+Inf) = +Inf
  If the parameter is the positive infinity, the function returns the same (+Inf).
• Exp2(NaN) = NaN
  If the parameter is NaN (Not-A-Number), the function returns the same (NaN).

Example 1:

// Golang program to demonstrate the
// example of math.Exp2() Function

package main

import (
	"fmt"
	"math"
)

func main() {
	fmt.Println(math.Exp2(0))
	fmt.Println(math.Exp2(5))
	fmt.Println(math.Exp2(-5))
	fmt.Println(math.Exp2(10.5))
	fmt.Println(math.Exp2(-10.5))

	fmt.Println(math.Exp2(math.Inf(1)))
	fmt.Println(math.Exp2(math.NaN()))
}

Output:

1
32
0.03125
1448.1546878700492
0.0006905339660024878
+Inf
NaN

Example 2:

// Golang program to demonstrate the
// example of math.Exp2() Function

package main

import (
	"fmt"
	"math"
)

func main() {
	var x float64
	var Exp2X float64

	x = 0
	Exp2X = math.Exp2(x)
	fmt.Println("Exp2(", x, ") = ", Exp2X)

	x = 0.5
	Exp2X = math.Exp2(x)
	fmt.Println("Exp2(", x, ") = ", Exp2X)

	x = 6
	Exp2X = math.Exp2(x)
	fmt.Println("Exp2(", x, ") = ", Exp2X)

	x = -6
	Exp2X = math.Exp2(x)
	fmt.Println("Exp2(", x, ") = ", Exp2X)

	x = -0.15
	Exp2X = math.Exp2(x)
	fmt.Println("Exp2(", x, ") = ", Exp2X)

	x = math.NaN()
	Exp2X = math.Exp2(x)
	fmt.Println("Exp2(", x, ") = ", Exp2X)

	x = math.Inf(1)
	Exp2X = math.Exp2(x)
	fmt.Println("Exp2(", x, ") = ", Exp2X)
}

Output:

Exp2( 0 ) =  1
Exp2( 0.5 ) =  1.414213562373095
Exp2( 6 ) =  64
Exp2( -6 ) =  0.015625
Exp2( -0.15 ) =  0.9012504626108302
Exp2( NaN ) =  NaN
Exp2( +Inf ) =  +Inf

Golang math Package Constants and Functions »

---