Ansible 11. Variables - different ways to refer a variable.

 All three ways you wrote are valid in Ansible, but there are subtle differences in syntax and formatting:

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1️⃣ Single-line without quotes

msg: Successfully connected to {{ db_name_to_check }} on {{ db_hostname }}

• Works fine for simple single-line messages.

• No quotes needed if there are no special characters.

• Best for short messages.

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2️⃣ Single-line with quotes

msg: "Successfully connected to {{ db_name_to_check }} on {{ db_hostname }}"

• Also works the same as above.

• Quotes allow using special characters (like :) or spaces at the start/end safely.

• Good practice if your message might include special YAML characters.

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3️⃣ Multi-line / folded style (>)

msg: >
  Successfully connected to {{ db_name_to_check }} on {{ db_hostname }}.

• > allows multi-line YAML strings.

• Line breaks in YAML become spaces in the final string.

• Useful if your message spans multiple lines.

Example:

msg: >
  Successfully connected to {{ db_name_to_check }} on {{ db_hostname }}.
  Database size: {{ postgres_status.databases[db_name_to_check].size }}

• This produces a single line in output:
  "Successfully connected to postgres on oel02db.mydb.com. Database size: 12345"

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✅ Summary / Recommendation

Style	Use case
No quotes	Simple, short messages
Quotes	Messages with special characters or punctuation
> folded	Long messages, multiple lines, better readability