how to write empty variable....

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...

Answer 1

[ChristianW]

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

[Elysi Cochin]

thank u so much....

[Abdul Rehman Akbar]

Thank You very much. I was searching this command. your answer is very useful for me.

[Nikolay]

I think it should rather be:

exist('A', 'var')