isletter true false

Question

Tor Fredrik Hove 2011-10-15

0
链接

此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/18389-isletter-true-false

How does isletter work here. Is it the value 1 that makes it executable and the value 0 that makes it not excecute and go to else?

http://bildr.no/view/1001050

0 个评论
显示 -2更早的评论隐藏 -2更早的评论

请先登录，再进行评论。

请先登录，再回答此问题。

Answer 1

per isakson 2011-10-15

0
链接

此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/18389-isletter-true-false#answer_24691

在 MATLAB Online 中打开

isletter is a function, which returns a logical value. The logical values, true and false, are displayed as 1 and 0, respectively by Matlab. Test by running

class( isletter('a'))

Thus, you may read "if true" execute the if-clause else execute the else-clause.

0 个评论
显示 -2更早的评论隐藏 -2更早的评论

请先登录，再进行评论。

Answer 2

Wayne King 2011-10-15

0
链接

此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/18389-isletter-true-false#answer_24689

I don't see isletter() in what you've posted. I see an if statement based on the output of menu()

The menu() call you show outputs a 1,2,or 3 based on what the user selects. 1 for Cheese, 2 for Shroom, and 3 for Sausage.

If the user were to simply kill the figure window, then output would be 0.

2 个评论
显示无隐藏无

the cyclist 2011-10-15

Wayne, you need to scroll down a bit to see the relevant section he is asking about.

Wayne King 2011-10-15

@cyclist, :) oh I see

请先登录，再进行评论。

Answer 3

the cyclist 2011-10-15

0
链接

此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/18389-isletter-true-false#answer_24690

Basically, yes. "1" is a representation of the boolean "true", and "0" is a representation of the boolean "false". So, "if 1" means "if true", and the statement executes accordingly.