Conventions used in this document

Typographical conventions

The following table explains the typographical conventions used in this document.

Table 2. Typographical conventions
Typeface Indicates Example
bold Commands, executable names, compiler options and pragma directives If you specify -O3, the compiler assumes -qhot=level=0. To prevent all HOT optimizations with -O3, you must specify -qnohot.
italics Parameters or variables whose actual names or values are to be supplied by the user. Italics are also used to introduce new terms The maximum length of the trigger_constant in fixed source form is 4 for directives that are continued on one or more lines.
monospace Examples of program code, command strings, or user-defined names Also, specify the following runtime options before running the program, with a command similar to the following: export XLFRTEOPTS="err_recovery=no:
langlvl=90std"

Syntax diagrams

Throughout this document, diagrams illustrate XL Fortran syntax. This section will help you to interpret and use those diagrams.

Sample syntax diagram

The following is an example of a syntax diagram with an interpretation:

Read syntax diagramSkip visual syntax diagram                                              .-,-.
           (1)                                V   |
>>-EXAMPLE-------char_constant--+-a-+--+---+----e-+------------->
                                '-b-'  +-c-+
                                       '-d-'
 
>--name_list---------------------------------------------------><
 
Notes:
  1. IBM extension

Interpret the diagram as follows:

Examples and basic examples

The examples in this document are labelled as either "Example" or "Basic example". Basic examples are intended to document a procedure as it would be performed during a basic installation, with little or no modification.