What is comma operator ?

Answer 1

Please specify language in Relevant Tags.

(Edit)
Wikipedia to the rescue (hopefully)
https://en.m.wikipedia.org/wiki/Comma_operator

Answer 2

The comma operator is used when making multiple declarations on one line.

For example:

int x, y;

Answer 3

What language?

Answer 4

C++

Answer 5

Idrees Jahangir sorry but i don't know...
Anyway, you made the code easier to read for others. Well done!

Answer 6

Thanks

Answer 7

I found this helpful:
https://en.m.wikipedia.org/wiki/Comma_operator
In summery it calculates and discards of the first operand and evaluation and returns the second one
(if more than 2 operands, basically returns the last one)