Numeric expressions

Numeric expressions can be used:

• to set and change integer values
• to index shelves
• in some conditions
• in most other parts of OmniMark where a numeric value can be used

In OmniMark, a numeric expression is an integer value between -2,147,483,647 and 2,147,483,647.

The simplest forms of a numeric expression are:

• A decimal integer expressed as an optional plus ("+") or minus ("-") sign followed by a sequence of digits.
• The value of a integer item.
• Any string expression, if its representation forms a valid number. For example, "-33" could be used in a context where a numeric value is expected, and it would be interpreted as the number -33.

Because any string expression can be used as a numeric value, saved pattern text, attribute values, and even element content can be used as a numeric value, provided that the contents form a valid number.

Numbers with a radix other than 10 must be expressed as a string expression, and can be converted to a numeric expression using the operator base.

Types of numeric operators are:

• sign operators
• arithmetic operators
• bit-oriented operators
• comparison operators -- see Numeric expressions: comparing

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