Here, We will learn **how to get the arc tangent of y/x** **in go. **We can get it by using **Atan2() function in math package in go golang.**

**Function prototype:**

`func Atan2(y, x float64) float64`

**Return value:**

`Atan2() function in math package returns`

the arc tangent of y/x by using the signs of

the two to determine the quadrant of the

return value.

**Example with code:**

```
package main
import (
"fmt"
"math"
)
func main() {
no := math.Atan2(1, 2)
fmt.Printf("%.2f\n", no)
no = math.Atan2(0, 0)
fmt.Printf("%.2f\n", no)
no = math.Atan2(1, 4)
fmt.Printf("%.2f\n", no)
no = math.Atan2(3, 4)
fmt.Printf("%.2f\n", no)
no = math.Atan2(5, 2)
fmt.Printf("%.2f\n", no)
}
```

**Output:**

0.46

0.00

0.24

0.64

1.19

**To learn more about golang, Please refer given below link:**

https://www.techieindoor.com/go-lang-tutorial/

**References:**

https://golang.org/doc/

https://golang.org/pkg/