what is the meaing of this int _port; declaration

[mdshafi01]

Please can any one able to explain about this type of declaration.

int _port;

[ashitpro]

Please can any one able to explain about this type of declaration.

int _port;

"_port" is variable name. that's it.
You can use "_" in declaring variables;

[mdshafi01]

What is the difference between using
int port and int _port;

shafi

[ashitpro]

What is the difference between using
int port and int _port;

shafi

Variable name starting with '_' are mostly used by compiler developers, and system libraries, Indicating the special meaning or importance of that variable.

You can use it,but it creates other impression.
Better you use 'iPort'. It is much more readable.