pTAL Reference Manual (G06.24+, H06.09+, J06.03+)

Table 18 Data Types (continued)

Values the Data Type Can Represent

Storage Unit

Data Type

64-bit floating-point number in the same range as data type REAL but

precise to approximately 16.5 significant decimal digits.

QuadruplewordREAL(64)

UNSIGNED(1-15) and UNSIGNED(17-31): Unsigned integer in the range

0 through (2n - 1)

n-bit fieldUNSIGNED

UNSIGNED(16):

• Unsigned integer in the range 0 through 65,535

• Signed integer in the range -32,768 through 32,767

UNSIGNED simple variable: The bit field can be 1 to 31 bits.

UNSIGNED array: The element bit field can be 1, 2, 4, or 8 bits.

Table 17 (page 46) describes storage units.

INT and INT(16) are the same type.

REAL and REAL(32) are the same type.

FIXED, FIXED(0), and INT(64) are the same type.

Topics:

• Specifying Data Types (page 47)

• Data Type Aliases (page 48)

• Operations by Data Type (page 48)

Specifying Data Types

The syntax for specifying the data type in a variable declaration is:

width

is a constant expression that specifies the width, in bits, of the variable. The value of width

must be appropriate for the data type (see Example 5 (page 48)):

Value of widthData Type

16INT (16)*

32INT (32)

64INT (64)*

32REAL(32)*

64REAL(64)

In the range 1 through 31UNSIGNED(n )

* Data type alias (see Data Type Aliases (page 48))

Data Types 47