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Chapter 7 PAC Language Configuration Elements

7-3

7.3 Language Element

The following elements are used to construct the PAC language.

• Identifier ...... the name to identify a construction element.

• Variable....... to temporarily store data.

• Constant...... data with a constant value.

• Operator...... a symbol to calculate two values.

• Expression .. a combination of construction elements used to obtain a value.

• Command.... an instruction built into the PAC language to execute

processes.

There are only a few types of variables and constants.

This chapter provides an explanation of the construction elements and data

types.

For information regarding commands refer to Part 2 “Command Reference.”

7.4 Name

The PAC language has regulations for identifying various elements in a

program. This chapter provides an explanation of these regulations. Names

that express commands, variables, functions, labels and programs follow the

conventions described below.

• A name must begin with a character (one-byte alphabet, no discrimination

between uppercase and lowercase letters)or ruled symbol.

• Characters, numerals and underscores can be used for names.

• The first character of a name must be an alphabet letter.

• A period, slash, back slash, blank, colon, semicolon, single quote, double

quotation, and asterisk cannot be used.

• Characters such as +, -, *, /, (, ) that are used as operators cannot be used.

• To distinguish the name from other words, place a blank character between

the name and the other words.

• The maximum number of characters that can be used for a name is 64.

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