SS64 Forum

Eehixohw

Member

Registered: 25 Sep 2011

Posts: 40

Why do you use _var instead of var?

Merry Christmas guys. Best wishes to everyone.

This thing always puzzled me, why the use of

_var=abc

instead of

var=abc

AFAIK it is only a preference thing, no usage at all.

Thank you

Nexusfactor

Member

Registered: 15 Dec 2015

Posts: 8

Re: Why do you use _var instead of var?

If you're using Python, then _Var means it's supposed to be a private variable, so treat it as such.

Any other time:

There's no language-defined meaning - it's just a convention some people use to distinguish instance variables from local variables. Other variations include m_foo (and s_foo or g_foo or static variables) or mFoo; alternatively some people like to prefix the local variables (and parameters) instead of the instance variables

foxidrive

Member

Registered: 04 Apr 2013

Posts: 339

Re: Why do you use _var instead of var?

AFAIK it is only a preference thing

Yes, in batch files there is no syntax that requires an underscore in a variable name.

It may be used because at a command prompt you can type

set _

and it will list all your variables to the screen - a useful tip for debugging.

The same technique can be used by prefixing your variables with a
and you can type set a to show them all.

Last edited by foxidrive (28 Dec 2015 14:13)