What does private float[] _b = new float[_A * _B] mean/imply

Question

Hello all,

 

I am very new to C# and I was given a code to work on.  Now I am trying to understand the very basic fundamentals.  So I ran into something like this:

 

private float[] _b = new float[_A * _B]

 

Very stupid but does * imply the multiplication of A and B?  

 

I am also interested to dump an array in a loop into a text or image file like *.jpg.  Is there any way I can dump the array only in the first iteration?

 

Thank you so much.