guardの条件判定での使い道について swift`guard``guard-let``guard ``if``guard `? `guard``if` func f1(_ a: Int) { if a <= 0 { print("0") return } print("") } func f2(_ a: Int) { guard a > 0 else { print("0") return } print("") }

masakih
`guard``unless`if not

`guard`2`switch``if`

`guard``guard``else``return``throw`

`guard`(`else`)`guard`(`not`)

`guard``optional binding``let``guard`
`if``optional binding``if``{}``let`

`guard`

`Swift`
`guard``if`