Interview › Scripting (Bash, Groovy)
How do you declare and iterate over an array in Bash? [Intermediate]
Answer
A Bash indexed array is declared with parentheses, such as arr=(a b c). I iterate with "${arr[@]}" to preserve each element exactly.
Technical explanation
Arrays are Bash-specific and are not portable to plain POSIX sh.
Use "${array[@]}" for elements and ${!array[@]} for indexes.
Quote each element expansion to handle spaces safely.
Hands-on example
services=("orders api" "payments" "worker")
for svc in "${services[@]}"; do
echo "deploying [$svc]"
done
services+=("scheduler")
echo "total=${#services[@]}
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