how to only have a certain amount of numbers in an input of as many characters and number that the user wants

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Valeria Chacon
Valeria Chacon 2016-10-25
回答： John Wirzburger 2016-10-25
prompt = 'Enter atleast 10 numbers: ';
str=0;
str = input(prompt,'s');
while length(str)~=10
str = input(prompt,'s');
end
that is the code that I'm using right now but I want the user to be able to input as many characters as they want but they can only enter 10 numbers. For example the user should be able to input:123we45ru687u90 but as long as it has ten numbers, the code will continue, no matter the amount of characters. Thank you!

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回答（1 个）

John Wirzburger
John Wirzburger 2016-10-25
If they must enter exactly 10 numbers and any number of characters, I would change your code to
prompt = 'Enter at least 10 numbers: ';
str='0';
while length(regexp(str,'\d'))~=10
str = input(prompt,'s');
end

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