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What is the Atanh function in Golang?

Faraz Karim

Grokking Modern System Design Interview for Engineers & Managers

Ace your System Design Interview and take your career to the next level. Learn to handle the design of applications like Netflix, Quora, Facebook, Uber, and many more in a 45-min interview. Learn the RESHADED framework for architecting web-scale applications by determining requirements, constraints, and assumptions before diving into a step-by-step design process.

The Atanh function in the Go programming language is used to find the inverse hyperbolic tangent value passed to it as input.

To use the Atanh function, you must import the math package in your file and access the Atanh function within it using the . notation (math.Atanh). Here, Atanh is the actual function, while math is the Go package that stores the definition of this function.

Syntax

The definition of the Atanh function inside the math package is shown below:

Parameters

The Atanh function takes a single argument of type float64 that represents the angle whose inverse hyperbolic tangent value you want to find.

Return value

The Atanh function returns a single value of type float64 that represents the inverse hyperbolic tangent value of the argument. The possible range of all return values is between negative infinity and positive infinity.

An exception to the above statements is when you pass something that is less than -1, greater than +1, or NAN as an argument. In these cases, the Atanh function returns NAN.

Code

Below is a simple example in which we use the Atan function to find the inverse hyperbolic tangent value of 0.5:

package main
import "fmt"
import "math"
func main() {
x := math.Atanh(0.5)
fmt.Println(x)
}

The following example shows how passing NAN as an argument makes the Atanh function return NAN:

package main
import "fmt"
import "math"
func main() {
x := math.Atanh(1.5)
fmt.Println(x)
}

RELATED TAGS

golang
communitycreator

Grokking Modern System Design Interview for Engineers & Managers

Ace your System Design Interview and take your career to the next level. Learn to handle the design of applications like Netflix, Quora, Facebook, Uber, and many more in a 45-min interview. Learn the RESHADED framework for architecting web-scale applications by determining requirements, constraints, and assumptions before diving into a step-by-step design process.

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