Go Standard Library Cookbook

How to do it...

1. Open the console and create the folder chapter03/recipe10.
2. Navigate to the directory.
3. Create the radians.go file with the following content:

        package main        import (          "fmt"          "math"        )        type Radian float64        func (rad Radian) ToDegrees() Degree {          return Degree(float64(rad) * (180.0 / math.Pi))        }        func (rad Radian) Float64() float64 {          return float64(rad)        }        type Degree float64         func (deg Degree) ToRadians() Radian {          return Radian(float64(deg) * (math.Pi / 180.0))        }        func (deg Degree) Float64() float64 {          return float64(deg)        }        func main() {          val := radiansToDegrees(1)          fmt.Printf("One radian is : %.4f degrees\n", val)          val2 := degreesToRadians(val)          fmt.Printf("%.4f degrees is %.4f rad\n", val, val2)          // Conversion as part // of type methods ...