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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 ** Tanh function** in the Go programming language is used to find the hyperbolic tangent value of the angle passed to it as input.

To use the `Tanh`

function, you must import the `math`

package in your file and use the `.`

notation (`math.Tanh`

) to access the `Tanh`

function. Here, `Tanh`

is the actual function, while `math`

is the Go package that stores the definition of this function.

The definition of the `Tanh`

function inside the `math`

package is shown below:

The `Tanh`

function takes a single argument of type `float64`

that represents the angle whose hyperbolic tangent value you want to find.

The `Tanh`

function returns a single value of type `float64`

that represents the hyperbolic tangent value of the argument. The possible range of all return values is between -1 and +1.

An exception to the above statements is when you pass something that is

`NAN`

as an argument. In these cases, the`Tanh`

function returns a`NAN`

.

Below is a simple example where we use the `Tanh`

function to find the hyperbolic tangent value of 25:

package mainimport "fmt"import "math"func main() {x := math.Tanh(25)fmt.Println(x)}

The following example shows how passing a `NAN`

as an argument makes the `Tanh`

function return `NAN`

:

package mainimport "fmt"import "math"func main() {x := math.Tanh(math.NaN())fmt.Println(x)}

In the example above, we use the

`NaN`

function to generate a`NAN`

value.

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CONTRIBUTOR

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.

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