ios
guard
boywin1992
2022. 5. 19. 19:07
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var a : Int? = 100
var b : Int? = nil
func guardFunc001 () {
guard let p1 = a else {
print("p1 is nil")
return
}
print("p1 = \(p1)")
}
func guardFunc002 () {
guard let p1 = b else {
print("p1 is nil")
return
}
print("p1 = \(p1)")
}
guardFunc001() // resut : p1 = 100
guardFunc002() // resut : p1 is nil
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