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Finding Base-2 Exponential of a 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 base-2 exponential, i.e., 2**a of the specified number with the help of Exp2() 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 Exp2() function.

Syntax:

func Exp2(a float64) float64
  • If you pass +Inf in this function, then this function will return +Inf.
  • If you pass NaN in this function, then this function will return NaN.

Example 1:




// Golang program to illustrate how to find
// base-2 exponential of the given number
  
package main
  
import (
    "fmt"
    "math"
)
  
// Main function
func main() {
  
    // Finding base-2 exponential 
    // of the given number
    // Using Exp2() function
    res_1 := math.Exp2(3)
    res_2 := math.Exp2(-1)
    res_3 := math.Exp2(math.Inf(1))
    res_4 := math.Exp2(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: 8.0
Result 2: 0.5
Result 3: +Inf
Result 4: NaN

Example 2:




// Golang program to illustrate how to find
// base-2 exponential of the given number
  
package main
  
import (
    "fmt"
    "math"
)
  
// Main function
func main() {
  
    // Finding base-2 exponential
    // Using Exp2() function
    nvalue_1 := math.Exp2(7.3)
    nvalue_2 := math.Exp2(-3)
    res := nvalue_1 + nvalue_2
    fmt.Printf("%.1f + %.1f = %.1f",
            nvalue_1, nvalue_2, res)
  
}

Output:

157.6 + 0.1 = 157.7 



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