Conventions and Symbols

This type style

Indicates an element of syntax, parameter name, keyword, filename, computer output, or part of a program example. The text appears in lowercase unless uppercase is significant.

This type style

Indicates the exact characters you type as input. Also used to highlight the elements of a graphical user interface such as buttons or menu names.

This type style

Indicates a placeholder for an identifier, an expression, a string, a symbol, or a value. Substitute one of these items for the placeholder.

[ items ]

Indicates that the items enclosed in brackets are optional.

{ item | item }

Indicates to select only one of the items listed between braces. A vertical bar ( | ) separates the items.

... (ellipses)

Indicates that you can repeat the preceding item.