Brace expansion ({1..10}) in Bash Scripting - Mini Project: Build & Apply

Using Brace Expansion to Generate Number Sequences in Bash

📖 Scenario: Imagine you are organizing a small event and need to create folders numbered from 1 to 10 to store participant files. Doing this manually would take time, so you want to automate it using a simple Bash script.

🎯 Goal: Build a Bash script that uses brace expansion {1..10} to generate a sequence of numbers and create folders named folder1 to folder10.

📋 What You'll Learn

Create a variable with the sequence of numbers from 1 to 10 using brace expansion.

Create a prefix variable for folder names.

Use a loop to combine the prefix and numbers to create folder names.

Print the folder names to verify the output.

💡 Why This Matters

🌍 Real World

Automating repetitive tasks like creating multiple folders or files saves time and reduces errors.

💼 Career

Knowing how to use brace expansion and loops in Bash is useful for system administrators, DevOps engineers, and anyone working with Linux shell scripting.

1

Create a variable with numbers 1 to 10 using brace expansion

Create a variable called numbers and assign it the sequence generated by brace expansion {1..10}.

Bash Scripting

# Create a variable called numbers with the sequence {1..10}
numbers=({1..10})

Need a hint?

Use numbers=({1..10}) to create a sequence from 1 to 10.

2

Create a prefix variable for folder names

Add a variable called prefix and set it to the string folder.

Bash Scripting

numbers=({1..10})
prefix=folder
# Your code here

Need a hint?

Set prefix=folder to use as the folder name start.

3

Use a loop to combine prefix and numbers to create folder names

Write a for loop using num as the iterator to go through ${numbers[@]}. Inside the loop, create a variable folder_name by combining $prefix and $num.

Bash Scripting

numbers=({1..10})
prefix=folder
for num in ${numbers[@]}; do
    folder_name="$prefix$num"
    # Your code here
 done

Need a hint?

Use for num in ${numbers[@]} and combine with prefix inside the loop.

4

Print the folder names to verify the output

Inside the loop, add a echo statement to print the folder_name variable.

Bash Scripting

numbers=({1..10})
prefix=folder
for num in ${numbers[@]}; do
    folder_name="$prefix$num"
    # Print folder_name here
 done

Need a hint?

Use echo "$folder_name" inside the loop to print each folder name.