checking that a user input is an integer

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Jonathan Bird
Jonathan Bird 2018-2-19
回答： Star Strider 2018-2-19
The user is told to input an integer between 1 and 59 but I want an error message to display if the value they enter is not an integer. This is what I have so far:
prompt = {'Enter your first integer between 1 and 59'};
dlg_title = 'User inputs';
num_lines = 1;
answer = inputdlg(prompt,dlg_title,num_lines);
u=str2double(answer{1});

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采纳的回答

Star Strider
Star Strider 2018-2-19
There are several ways of testing to see if the returned value is an integer.
You want to see if there is any non-zero value to the right of the decimal, so test for that. You can also experiment with the rem or mod functions.

更多回答（1 个）

Roger Stafford
Roger Stafford 2018-2-19
Test whether this is true. If so, 'prompt' is an integer, otherwise it is not.
prompt==round(prompt)

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