Swift Language Variables & Properties Local and Global Variables
Example
Local variables are defined within a function, method, or closure:
func printSomething() {
let localString = "I'm local!"
print(localString)
}
func printSomethingAgain() {
print(localString) // error
}
Global variables are defined outside of a function, method, or closure, and are not defined within a type (think outside of all brackets). They can be used anywhere:
let globalString = "I'm global!"
print(globalString)
func useGlobalString() {
print(globalString) // works!
}
for i in 0..<2 {
print(globalString) // works!
}
class GlobalStringUser {
var computeGlobalString {
return globalString // works!
}
}
Global variables are defined lazily (see "Lazy Properties" example).
