Which characters may be used as the second character of an identifier,but not as the first character of an identifier?

Q

Which characters may be used as the second character of an identifier,but not as the first character of an identifier?

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A

The digits 0 through 9 may not be used as the first character of an identifier but they may be used after the first character of an identifier.

2013-02-14, 2074👍, 0💬