Intel 9800758-02 manual Decimal Integer Constants, Hexadecimal Integer Constants

Language Elements BASIC-80

Constants

Constants are numeric values that do not change during program execution. A con- stant can be a decimal integer, hexadecimal integer, octal integer, single-precision floating-point number, or double-precision floating-point number.

Table 2-5. Numeric Data Types

Numeric Type	Range	Storage	Definition	Suffix	Examples
		Required
Integer (decimal)	-32768 to	2 bytes	DEFINT	%	X%
	+32767				9463%
Integer (hexadecimal)	Oto	2 bytes	-	H	OFF4H
	FFFFH
Integer (octal)	Oto	2 bytes	-	0	7720
	1777770
Single-precision floating-point	±1.2 x 10-38to	4 bytes	DEFSNG	!	X!
(7 digits precision)	± 3.4 x 1038				9436.5!
					9.4365E03
Double-precision floating-point	± 2.2 x 10-308to	8 bytes	DEFDBL	#	X#
(16 digits precision)	± 1.8 x 10308				9436.5#
					9.4365D03

Integer Constants

Integer constants are whole numbers in the range -32768to 32767. Each integer constant requires two bytes of memory. Because the storage requirements are lowest for integers and integer arithmetic is much faster than floating-point arithmetic, it's a good idea to use integer representation wherever possible.

Decimal Integer Constants

To identify a constant as a decimal integer constant, add the suffix 070 to the decimal integer value.

Some decimal integer constants are:

Hexadecimal Integer Constants

Hexadecimal integer constants are identified by the suffix H following the numeric value. The characters 0-9 and A-F (representing the decimal values 10-15) are used as hexadecimal digits. Each character represents 4 bits of data. The first character must be a decimal digit, so it may be necessary to add a leading o. Some hexadecimal in- teger constants are:

Hexadecimal Decimal

Equivalent

1FH31

OC76H3190

7H7

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