28

This is probably an incredibly simple question, but I did not find any answer so far (I must lack the right sources, and I don't know where to search in vim's help).

I have a condition and I would like it to include 'AND', like

if (condition1 .AND. condition2)
   "do what I want you to do
endif

but I couldn't find the syntax. Same thing for 'OR'.

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  • 8
    Heh, .AND. and .OR. is Fortran syntax, I haven't seen that used outside Fortran code in a long, long while. :) Vim uses C-like syntax instead, && for AND and || for OR. See :h expression-syntax for more. – lcd047 Jun 15 '16 at 10:30
  • 1
    I felt compassion in your comment, with *I haven't seen that used outside Fortran code in a long, long while. :) *: thank you for that. As for your comment, if you post it as an answer I'll gladly accept it ! – Feffe Jun 15 '16 at 10:44
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    I find it confusing how the question title puts "and" and or and "or" next to each other like that. (jk) – Ben Millwood Jun 15 '16 at 13:47
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    I could have written "and" and/or "or". But I did not dare ! – Feffe Jun 15 '16 at 13:48
29

As @lcd047 said in his comment, vimscript use C-like operators && and ||.

You can find description of their usage on :h expr2. Some important points mentioned by the doc are the following

You'll find that the operators can be concatenated and && takes precedence over ||, so

&nu || &list && &shell == "csh"

Is equivalent to

&nu || (&list && &shell == "csh")

Also once the result is known, the expression "short-circuits", that is, further arguments are not evaluated. This is like what happens in C.

If you use: 

if a || b

The expression will be valid even is b is not defined.

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  • 2
    Note that I made this answer because @lcd047 didn't wrote one and I thought the note about the doc would be interesting but if lcd047 produces an answer I would gladly delete this one to let him fairly get the credit – statox♦ Jun 15 '16 at 11:22
  • 1
    I doubt it. Sometime ago lcd047 told me they won't be posting answers. – muru Jun 15 '16 at 11:26
  • @muru: I also remembered seeing that somewhere but I wasn't 100% sure it were him and not another user. – statox♦ Jun 15 '16 at 11:28

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