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| let primeiroValorString = "20" | |
| let segungoValorStrig = "2" | |
| func somaGuardLet(um: String, dois: String) -> String{ | |
| guard let primeiro = Double(um) else { return ""} | |
| guard let segundo = Double(dois) else { return ""} | |
| let soma = primeiro + segundo | |
| return String(soma) | |
| } | |
| let soma = somaGuardLet(um: primeiroValorString, dois: segungoValorStrig) | |
| print(soma) |
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