How to Stop MATLAB Program When Input Exceeds a Certain Value?

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Hikarikaze
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Hi there, I have a question about generating an error message in MATLAB..

say, A = input('Value of A = ')
if A > 5
disp ('Value of A is larger than 5')
else

end


So, question here is... How can I make the program stop once it finds out A is larger than 5 and returns to the previous command where it asks for the value of A so we can input a new value of A?
 

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You can put the whole process into a while loop. Search help in Matlab for the usage of while. There are lots of other good stuff on the internet also.