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(gawk.info)Constants

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Constant Expressions
====================

   The simplest type of expression is the "constant", which always has
the same value.  There are three types of constants: numeric, string,
and regular expression.

   Each is used in the appropriate context when you need a data value
that isn't going to change.  Numeric constants can have different
forms, but are stored identically internally.

Scalar Constants

Numeric and string constants.

Non-decimal-numbers

What are octal and hex numbers.

Regexp Constants

Regular Expression constants.