Can I only declare a variable NOT define.

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Jeong-Hoon Park
Jeong-Hoon Park 2017 年 8 月 23 日
編集済み: José-Luis 2017 年 8 月 23 日
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?

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José-Luis
José-Luis 2017 年 8 月 23 日
編集済み: José-Luis 2017 年 8 月 23 日
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.

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