YAML
YAML (YAML Ain't Markup Language™) is one of the most commonly used configuration file formats used by developers. It mimics JSON in data structure but is more readable and easier to write and understand. YAML files use the .yaml or .yml extension, and is composed of colon-separated key-value pairs. The data types supported by YAML include numbers, booleans, strings, lists, and dictionaries.
config.yml
# This is a comment
key: value
another_key: another_value
a_list:
- item1
- item2
- item3
a_dictionary:
key: value
another_key: another_value
a_number: 123
a_boolean: true
a_string: "Hello World"