April 2020
Intermediate to advanced
506 pages
20h 7m
Polish
Content preview from Go
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42 Rozdział 2.
Używanie instrukcji warunkowych
$ go run pass_fail.go
Podaj ocenę: 100
2018/03/11 18:27:08 <nil>
exit status 1
$
System Edycja Widok Okno Pomoc
Wiadomo, że jeśli wartość w zmiennej
err
to
nil
, odczyt danych
z klawiatury zakończył się powodzeniem. Teraz, gdy już znasz instrukcje
if
, pora zaktualizować kod, aby rejestrował błąd wtedy i tylko wtedy,
jeśli
err
nie jest równe
nil
.
$ go run pass_fail.go
Podaj wynik: 100
100
$
System Edycja Widok Okno Pomoc
Jeśli ponownie uruchomisz program, zobaczysz, że działa.
Jeżeli teraz wystąpią błędy w trakcie wczytywania danych
wejściowych od użytkownika, zobaczysz je!
input, err := reader.ReadString(‘\n’) ...
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O’Reilly covers everything we've got, with content to help us build a world-class technology community, upgrade the capabilities and competencies of our teams, and improve overall team performance as well as their engagement.Julian F.
I wanted to learn C and C++, but it didn't click for me until I picked up an O'Reilly book. When I went on the O’Reilly platform, I was astonished to find all the books there, plus live events and sandboxes so you could play around with the technology.Addison B.
I’ve been on the O’Reilly platform for more than eight years. I use a couple of learning platforms, but I'm on O'Reilly more than anybody else. When you're there, you start learning. I'm never disappointed.Amir M.
I'm always learning. So when I got on to O'Reilly, I was like a kid in a candy store. There are playlists. There are answers. There's on-demand training. It's worth its weight in gold, in terms of what it allows me to do.