Why 1? It's arbitrary, but it's anything other than zero so I just exit because something went wrong and this program is just going to bail.
为什么是1?这是任意的,但它是非零的,因为出错了,我退出程序,然后这个程序就释放了。
And most of these commands you don't actually need but this little caret symbol means control, so every keyboard these days has a control key so you hold that and hit X for instance to exit the program.
这里大多数命令你们都用不着,这个小插入符意味着控制,每个键盘都有一个控制键,譬如,当你敲入X时,就退出这个程序。
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