Conventions

(see margin)

Change bars in the margin show where substantial changes have been made to the manual since the last edition.

nonitalics

Within syntax descriptions, nonitalicized words represent literals. Enter them exactly as shown. This includes nonitalicized braces and brackets appearing within syntactic descriptions. Nonitalicized words and punctuation characters appear in computer font. In the following example, you must provide both the keyword and the trailing semicolon:

italics

Within syntax descriptions, italicized words denote argument names, program names, or strings that you must replace with an appropriate value. In the following example, you must replace identifier with the name of a label you want the program to transfer execution to at this point:

goto identifier;

Within syntax descriptions, brackets surround optional elements. For example, the expression in the return statement is optional:

return [expression];

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Within examples, vertical ellipses may show where portions of the example were omitted.