how to write empty variable....

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Elysi Cochin
Elysi Cochin 2013-3-4
评论： Nikolay 2019-4-24
while doing a calculation if i get a variable named "varName" with empty value i wanted to display a message "Dont not Exist"...... how to write a code for checking whether a variable contains value or it is empty... please do reply...

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ChristianW
ChristianW 2013-3-4
A = [] % A is empty
isempty(A) % Is A empty?
exist(A,'var') % Does A exist as variable?
% empty and not existing isnt the same thing
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Abdul Rehman Akbar
Abdul Rehman Akbar 2014-4-10
Thank You very much. I was searching this command. your answer is very useful for me.
Nikolay
Nikolay 2019-4-24
I think it should rather be:
exist('A', 'var')

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