| Description | Numeric constants must begin with a decimal digit. The dollar sign character ('$') is allowed within constants to improve the readability. Error 1 occurs if, after the $ sign, no valid digit is encountered or some other invalid numeric character was found. The base of the number determines which characters are valid as shown below: - Base 2—0, 1, and the base indicator B
- Base 8—0-7 and the base indicator O or Q
- Base 10—0-9 and the base indicator D or no indicator
- Base 16—0-9, A-F, and the base indicator H
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