Can you explain the role of quotes in the 'echo' command?

In the echo command, quotes play an important role in how the shell interprets the text you want to display. Here’s how they work:

Double Quotes ("):
- When you enclose a string in double quotes, the shell interprets any variables or special characters within the quotes.
- For example:
```
name="Labby"
echo "Hello, $name"
```
  This will output:
```
Hello, Labby
```
- If you include special characters (like spaces), double quotes ensure that the entire string is treated as a single argument.
Single Quotes ('):
- When you use single quotes, the shell treats everything inside as a literal string. No variable expansion or special character interpretation occurs.
- For example:
```
name="Labby"
echo 'Hello, $name'
```
  This will output:
```
Hello, $name
```
- Single quotes are useful when you want to display the exact text without any interpretation.
No Quotes:
- If you do not use quotes and your message contains spaces, the shell will treat each word as a separate argument.
- For example:
```
echo Hello Labby
```
  This will output:
```
Hello Labby
```
- However, if you have a message with spaces and do not use quotes, it may lead to unexpected behavior or errors.

In summary, quotes in the echo command help control how the shell interprets the text, allowing for variable expansion with double quotes and literal interpretation with single quotes.