Quoting Rules

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Quoting Rules

Quoting Rules

Double quotes ("...") allow variable expansion and command substitution inside them, while single quotes ('...') treat everything literally, including $. Unquoted variables get word-split and glob-expanded by the shell, which can cause bugs with spaces in values. Quoting variables consistently is one of the most important Bash habits.

Note: Always quote variables you expand, like "$name", unless you specifically want word-splitting.

Example: Quoting Rules

bash

#!/bin/bash
name="Bob Smith"

echo "Double quotes: $name"
echo 'Single quotes: $name'
echo Unquoted: $name

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Chapter Quiz — Complete all 13 topics to unlock

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Complete these topics first:

Variable Basics
String Variables & Quoting Rules
Quoting Rules
Integer Arithmetic
Environment Variables
Environment Variables & export
readonly Variables
readonly and unset
export
Special Variables
Special Variables ($0 $1 $?)
Introduction to Arrays
Default Values & Parameter Expansion Basics

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Quoting Rules

Quoting Rules

Chapter Quiz — Complete all 13 topics to unlock

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