Constant value

A constant value is the actual value. The types of constants are character string (includes names, date and hexadecimal values), decimal, and logical.

• Character string
  A character string is a string of any EBCDIC characters (alphanumeric and special) that are used as a value.
• Hexadecimal values
  A hexadecimal value is a constant made up of a combination of the hexadecimal digits A through F and 0 through 9.
• Date values
  A date value is a character string that represents a date.
• Decimal values
  A decimal value is a numeric string of one or more digits, optionally preceded by a plus (+) or minus (-) sign.
• Logical values
  A logical value is a single character (1 or 0) enclosed in apostrophes.
• Floating-point constants
  A floating-point constant is a representation of a numerical constant, shown as an optional sign followed by one or more digits and a decimal point, which may be at the end.