How to Find the Sum of Angles in Golang

The challenge

Find the total sum of internal angles (in degrees) in an n-sided simple polygon.

N will be greater than 2.

The solution in Golang

Option 1:

package solution func Angle(n int) int { return (n - 2) * 180 }
Code language: Go (go)

Option 2:

package solution func Angle(n int) (r int) { r = (n-2)*180 return }
Code language: Go (go)

Option 3:

package solution func Angle(n int) int { return (n/2-1) * 360 + n%2 * 180 }
Code language: Go (go)

Test cases to validate our solution

package solution_test import ( . "github.com/onsi/ginkgo" . "github.com/onsi/gomega" ) var _ = Describe("Basic tests", func() { It("Angle(3)", func() { Expect(Angle(3)).To(Equal(180)) }) It("Angle(4)", func() { Expect(Angle(4)).To(Equal(360)) }) })
Code language: Go (go)
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