Indexed Arrays in Bash
From the Bash Scripting cheat sheet · Arrays · verified Jul 2026
Indexed Arrays
Ordered, zero-based lists.
bash
# Quick Reference
arr=(a b c)
echo "${arr[0]}" # a
echo "${arr[@]}" # all elements
echo "${#arr[@]}" # length -> 3
arr+=(d) # append💡 ${arr[@]} expands to all elements; ${#arr[@]} is the count.
⚡ Always quote "${arr[@]}" in loops so elements with spaces stay intact.
📌 Arrays are zero-indexed; ${arr[-1]} grabs the last element (bash 4.3+).
🟢 arr+=(item) appends; ${!arr[@]} lists the indices (useful for sparse arrays).
arraysindexed
Continue with Bash Scripting
Save the full cheat sheet or work through every related task.