Command-Line Syntax Key

Command line arguments are usually noted as below.

e.g. git clone <url> [local_name]

Notation	Description
Text without brackets or braces	Items you must type as shown
<Text inside angle brackets>	Placeholder for which you must supply a value
[Text inside square brackets]	Optional items
{Text inside braces}	Set of required items; choose one
Vertical bar (|)	Separator for mutually exclusive items; choose one
Ellipsis (…)	Items that can be repeated

Command line syntax - basic concept