quote:

A variable name may be any combination of the characters A through Z, 0 through 9, and the underscore (_). The first character of the name must be A through Z.

GamP

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- Using AS 8.2.01 on Windows 10 - IE11.
	in Focus since 1988

quote:

Reference: Naming Conventions for Local and Global Variables
Local and global variable names are user-defined, while system and statistical variables
have predefined names. The following rules apply to the naming of local and global variables:
A local variable name is always preceded by an ampersand (&).
A global variable name is always preceded by a double ampersand (&&).
Embedded blanks are not permitted in a variable name.
If a value for a variable might contain an embedded blank, comma, or equal sign, enclose
the variable in single quotation marks when you refer to it.
A variable name may be any combination of the characters A through Z, 0 through 9, and
the underscore. The first character of the name should be a letter.
You can assign a number instead of a name to a variable to create a positional variable.
The underscore may be included in a variable name, but the following special characters
are not permitted: plus sign, minus sign, asterisk, slash, period, ampersand, and
semicolon.