A decimal value is a numeric string of one or more digits, optionally preceded by a plus (+) or minus (-) sign.
A decimal value can contain a maximum of 15 digits, of which no more than nine can follow the decimal point (which can be either a comma or a period). Therefore, a decimal value can have no more than 17 character positions including the plus or minus sign and decimal point (if any). The following are examples of decimal values.
