Double quotes (variable expansion) in Bash Scripting - Mini Project: Build & Apply

Double Quotes and Variable Expansion in Bash

📖 Scenario: You are writing a simple bash script to greet users by their names. You want to learn how to use double quotes so that variables inside strings are expanded correctly.

🎯 Goal: Create a bash script that stores a user's name in a variable and then prints a greeting message using double quotes to expand the variable.

📋 What You'll Learn

Create a variable called name with the value "Alice".

Create a variable called greeting that uses double quotes to include the name variable inside the string.

Print the greeting variable to display the message.

💡 Why This Matters

🌍 Real World

Scripts often need to include user input or dynamic data in messages. Using double quotes correctly helps show the right information.

💼 Career

Understanding variable expansion is essential for writing effective bash scripts used in automation, system administration, and DevOps tasks.

1

Create the name variable

Create a variable called name and set it to the string "Alice".

Bash Scripting

# Create the variable name with value "Alice"
# Your code here

Need a hint?

Use name="Alice" to assign the value with double quotes.

2

Create the greeting variable with double quotes

Create a variable called greeting that stores the string Hello, $name! using double quotes so the name variable expands.

Bash Scripting

name="Alice"
# Create the greeting variable using double quotes and $name
# Your code here

Need a hint?

Use double quotes around the string so $name is replaced by its value.

3

Print the greeting variable

Use the echo command to print the value of the greeting variable.

Bash Scripting

name="Alice"
greeting="Hello, $name!"
# Print the greeting variable
# Your code here

Need a hint?

Use echo "$greeting" to print the greeting with variable expansion.

4

Run the script and see the output

Run the script so it prints Hello, Alice! exactly.

Bash Scripting

name="Alice"
greeting="Hello, $name!"
echo "$greeting"
# Run the script and check output

Need a hint?

Run the script in your terminal and check that it prints Hello, Alice!.