#1203·sh

zsh: support inline loop syntax

Author: danielbayleyCreated Oct 15, 2025Updated Sep 7, 2026

Labelszsh

As mentioned in https://github.com/mvdan/sh/issues/120#issuecomment-3401664643, just thought I’d mention inline command (condition) command loops, and give a few syntax examples that are definitely incompatible with Bash…

bash

for i (1 2 3) echo $i # 1 2 3

bash

foreach i (1 2 3) { echo $i } # 1 2 3

bash

while ((${i:-0} < 3)) echo $((++i)) # 1 2 3

bash

until ((${i:-0} > 2)) echo $((++i)) # 1 2 3

bash

set -- 1 2 3 # $@
for i
  echo $i # 1 2 3

bash

app=Terminal
while (pgrep $app) sleep 1
echo "$app was closed!"

Also, to share some useful, detailed notes I had bookmarked around this:

Source: mvdan/sh