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From: Marc Chantreux <mc@unistra.fr>
To: david <zsh@rayninfo.co.uk>
Cc: zsh-users@zsh.org
Subject: Re: if (()){}else{} documented?
Date: Tue, 20 Apr 2021 17:19:05 +0200	[thread overview]
Message-ID: <YH7w6Sxp0vhhtcYZ@prometheus.u-strasbg.fr> (raw)
In-Reply-To: <1154b0e1-e5ad-70be-f620-1368c86f12ed@rayninfo.co.uk>

Hi David,

> e.g. this only works as a single line (is that true?)
> if (( $1 == 4 )) { echo good } else { echo bad }

i'm not sure what a "single line" is. the "else" keyword should
not appear at the very begin of an expression but all the rest is ok.

meaning those are correct

     if (( $1 == 4 )) { echo good } else { echo bad }

     if (( $1 == 4 )) {
         echo good
     } else {
         echo bad
     }

this is not

     if (( $1 == 4 )) {
         echo good
     }
     else {
         echo bad
     }

> just wondered where I could read up on this?

all the following examples works fine there. i'm even surprised about
this one

> joe(){ [[ $1 > 4 ]] && echo big || echo small }

this is a math expression so i would have written

joe(){ (( $1 > 4 )) && echo big || echo small }

regards
marc


  reply	other threads:[~2021-04-20 15:21 UTC|newest]

Thread overview: 12+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-04-20 14:40 david
2021-04-20 15:19 ` Marc Chantreux [this message]
2021-04-20 15:28   ` Lawrence Velázquez
2021-04-20 15:32     ` Marc Chantreux
2021-04-21  8:46   ` zzapper
2021-04-21 10:41     ` Marc Chantreux
2021-04-21 12:32       ` zzapper
2021-04-21 14:59         ` Marc Chantreux
2021-04-21 15:01         ` Marc Chantreux
2021-04-21 13:57     ` Bart Schaefer
2021-04-20 15:33 ` Lawrence Velázquez
2021-04-21  9:16   ` zzapper

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