Uppercase and lowercase conversion in Bash Scripting - Mini Project: Build & Apply

Uppercase and lowercase conversion

📖 Scenario: You work in a small office where you often receive text data in mixed cases. To keep things neat, you want to convert text to all uppercase or all lowercase.

🎯 Goal: Build a simple Bash script that converts a given string to uppercase and lowercase.

📋 What You'll Learn

Create a variable with a specific string

Create a variable to hold the uppercase version

Create a variable to hold the lowercase version

Print both uppercase and lowercase results

💡 Why This Matters

🌍 Real World

Converting text case is useful for formatting data, preparing text for case-insensitive comparisons, or cleaning up user input.

💼 Career

Many automation scripts require text normalization. Knowing how to convert case in Bash helps in writing robust shell scripts for system administration and data processing.

1

Create the original text variable

Create a variable called text and set it to the exact string "Hello World".

Bash Scripting

# Create a variable called text with the value "Hello World"
# Your code here

Need a hint?

Use text="Hello World" to create the variable.

2

Create uppercase and lowercase variables

Create a variable called upper_text that converts text to uppercase using tr. Then create a variable called lower_text that converts text to lowercase using tr.

Bash Scripting

text="Hello World"
# Create upper_text by converting text to uppercase
# Create lower_text by converting text to lowercase
# Your code here

Need a hint?

Use $(echo "$text" | tr '[:lower:]' '[:upper:]') for uppercase and similarly for lowercase.

3

Print the uppercase and lowercase variables

Use echo to print the value of upper_text and then print the value of lower_text on the next line.

Bash Scripting

text="Hello World"
upper_text=$(echo "$text" | tr '[:lower:]' '[:upper:]')
lower_text=$(echo "$text" | tr '[:upper:]' '[:lower:]')
# Print upper_text
# Print lower_text
# Your code here

Need a hint?

Use echo "$upper_text" and echo "$lower_text" to print the results.

4

Final script output

Run the script to see the uppercase and lowercase versions of the original text printed exactly as shown.

Bash Scripting

# Run the script to see the output
# Your code here

Need a hint?

Just run the script to see the output.