GoLang – Find Arc Tangent - Atan2() Function

Atan2() function is used to find the arc tangent for the given inputs (y/x – parameters) in Go language.
The standard math package of Go programming language has Atan2() function. The purpose of this function is to find the arc tangent of y/x and it will also find the quadrant of the return value (output) by using the signs of both arguments (x and y).

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Syntax of `Atan2()` Function in Go Language

The syntax of Atan2() function in Go Language is:

func Atan2(y, x float64) float64

1	func Atan2(y, x float64) float64

Note: float64 is a data type in Go language which has IEEE-754 64-bit floating-point numbers.
Special cases are:


 Atan2(y, NaN) = NaN
 Atan2(NaN, x) = NaN
 Atan2(+0, x>=0) = +0
 Atan2(-0, x>=0) = -0
 Atan2(+0, x<=-0) = +Pi
 Atan2(-0, x<=-0) = -Pi Atan2(y>0, 0) = +Pi/2
 Atan2(y<0, 0) = -Pi/2 Atan2(+Inf, +Inf) = +Pi/4 Atan2(-Inf, +Inf) = -Pi/4 Atan2(+Inf, -Inf) = 3Pi/4 Atan2(-Inf, -Inf) = -3Pi/4 Atan2(y, +Inf) = 0 Atan2(y>0, -Inf) = +Pi
 Atan2(y<0, -Inf) = -Pi
 Atan2(+Inf, x) = +Pi/2
 Atan2(-Inf, x) = -Pi/2

Parameters of `Atan2()` Function in Go Language

x , y – Where both x and y is any Valid float64 Input value. These parameters are required.

Error Handling

If the x or y parameter are not numbers (numeric values) Atan2() function returns an error .
If there is no argument (x,y – input value) passes to the function, then the compiler will produce an error.

Return Value of `Atan2()` Function in Go Language

Atan2() function will returns the arc tangent of the given inputs(x and y– parameters). It uses the signs of two inputs to determine the quadrant of then return value.

GoLang `Atan2()` Function Example 1

package main

import "fmt"
import "math"

func main() {
	var x float64
	x = math.Atan2(0,0)
	fmt.Println(x)
}

package main

import "fmt"

import "math"

func main() {

var x float64

x = math.Atan2(0,0)

fmt.Println(x)

}

Output:
0

GoLang `Atan2()` Function Example 2

package main

import "fmt"
import "math"

func main() {
	var x float64
	x = math.Atan2(-8,9)
	fmt.Println(x)
}

package main

import "fmt"

import "math"

func main() {

var x float64

x = math.Atan2(-8,9)

fmt.Println(x)

}

Output:
-0.7266423406817255

GoLang `Atan2()` Function Example 3

package main

import "fmt"
import "math"

func main() {
	var x float64
	x = math.Atan2(10,4)
	fmt.Println(x)
}

package main

import "fmt"

import "math"

func main() {

var x float64

x = math.Atan2(10,4)

fmt.Println(x)

}

Output:
1.1902899496825317

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GoLang – Find Arc Tangent – Atan2() Function – Examples & Explanation

You might interested in:

Syntax of `Atan2()` Function in Go Language

Parameters of `Atan2()` Function in Go Language

Error Handling

Return Value of `Atan2()` Function in Go Language

GoLang `Atan2()` Function Example 1

GoLang `Atan2()` Function Example 2

GoLang `Atan2()` Function Example 3

Go `math` Package

Learn and Learn

Learn And Learn - great place for tutorials, references and how-to

You might interested in:

Syntax of Atan2() Function in Go Language

Parameters of Atan2() Function in Go Language

Error Handling

Return Value of Atan2() Function in Go Language

GoLang Atan2() Function Example 1

GoLang Atan2() Function Example 2

GoLang Atan2() Function Example 3

Go math Package

Syntax of `Atan2()` Function in Go Language

Parameters of `Atan2()` Function in Go Language

Return Value of `Atan2()` Function in Go Language

GoLang `Atan2()` Function Example 1

GoLang `Atan2()` Function Example 2

GoLang `Atan2()` Function Example 3

Go `math` Package