How to restrict input

Hi everyone, I am new to MATLAB, and I have a question on how to restrict inputs on Matlab. I want to make sure you that my input is exactly a 5 digit number, and it cannot be alphabets.

Thank you

Answer 1

[Adam Danz]

> I want to make sure you that my input is exactly a 5 digit number, and it cannot be alphabets

Assuming "5 digits" means an integer (positive or negative)

% Function to test x
testx = @(x)isnumeric(x) && ... % x must be a number
    isscalar(x) && ...      % x must be scalar
    mod(x,1)==0 && ...      % x must be an integer
    abs(x)<100000 && abs(x)>9999;  % x must have 5 digits (pos or neg)

% Some tests
testx(12345)

ans = logical
   1

testx(-12345)

ans = logical
   1

testx('a')

ans = logical
   0

testx(3.1213)

ans = logical
   0

testx(00001)

ans = logical
   0

testx(99999)

ans = logical
   1

testx([12345 54321])

ans = logical
   0