Store a variable from prompt user input

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Kundera
Kundera 2017-6-8
评论： Stephen23 2017-6-8
Hi, I have this function which display a request in the prompt and asks user to input a number. The function then repeats until user inputs a valid number.
function num = inputNumber(prompt)
while true
num = str2double(input('Write your age :', 's'));
if ~isnan(num)
break;
end
end
I want then to store the input in the variable num but it is not happening. Why? How can I solve it? Thanks

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Stephen23
Stephen23 2017-6-8
编辑：Stephen23 2017-6-8
I changed it so that there is a limit to how many attempts can be made, and also that the output is always defined:
function out = inputNumber(prompt)
out = NaN;
tot = 3; % how many attempts to make
while isnan(out) && tot>0
out = str2double(input('Write your age :', 's'));
tot = tot-1;
end
end
and tested:
>> num = inputNumber()
Write your age: 64
num = 64
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Kundera
Kundera 2017-6-8
Thanks a lot @Stephen. I am a beginner, so much to learn :-)
Stephen23
Stephen23 2017-6-8
@Kundera: my pleasure. Please do read the links that I gave.
You should accept the answer that best resolves your original question. Accepting answers is an easy way for you to show your thanks for us volunteers.

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