Golang Notes - 10

Defined Types

named type
created by developer

type speed uint


var s1 speed = 10

var x uint
x = s1 // cannot assign different type 
x = uint(s1) // conversion works

• can extend underlying type
• type safety
• readability

type km float64
type mile float64

var distanceInKM = 100
var distanceInMiles mile

distanceInMiles = mile(distanceInKM) / 0.621

Aliases

type T1 = T2

• byte - uint8
• rune - int32

type s = uint // alias to uint
type second uint // named type