Can I only declare a variable NOT define.

When I make a program, I've got a question. In C/C++, before using a variable, should define or at least declare the variable like the following.

int a;

or

int a = 2;

However in MATLAB, Can I just declare a variable? In other words, is

 variable;

varid?

Answer 1

[José-Luis]

No. Different paradigm. Matlab is weakly typed. Double is the default type. Implicit conversions everywhere.

 dummy = '3' * 5

Even funnier:

 dummy = 'θ' - pi

If you need it to exist before using it (why?), you can declare it to be empty.

 a = [];

And go on your merry way.