How to Use echo in Bash: Syntax and Examples

In bash, use the echo command to print text or variables to the terminal. Simply type echo followed by the text or variable you want to display, like echo "Hello, world!".

Syntax

The basic syntax of the echo command is:

• echo [options] [string]

Here, string is the text or variable you want to print. Options can modify the output, like -n to avoid a new line.

bash

echo [options] [string]

Example

This example shows how to print a simple message and a variable value using echo.

bash

name="Alice"
echo "Hello, world!"
echo "My name is $name"

Output

Hello, world!
My name is Alice

Common Pitfalls

Common mistakes include forgetting quotes around strings with spaces, which can cause unexpected output or errors. Also, using echo without quotes can lead to word splitting or globbing.

Another pitfall is expecting echo to interpret escape sequences like \n by default; you need to use -e option for that.

bash

echo Hello world  # prints: Hello world

echo "Hello world"  # correct way

echo "Line1\nLine2"  # prints literal \n

echo -e "Line1\nLine2"  # prints with new line

Output

Hello world
Hello world
Line1\nLine2
Line1
Line2

Quick Reference

Option	Description
-n	Do not output the trailing newline
-e	Enable interpretation of backslash escapes
-E	Disable interpretation of backslash escapes (default)

Key Takeaways

Use echo to print text or variables to the terminal in bash.

Always quote strings with spaces to avoid unexpected behavior.

Use -e option to enable escape sequences like new lines.

Use -n to print without a trailing newline.

Avoid unquoted variables to prevent word splitting and globbing.