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Appendix A. iSCRIPT Language Reference
A.1.
Variables and Expressions
In stand-alone scripts, variables are declared as follows:
var1, var2 as type
var1, var2 – variable names satisfying the variable naming convention.
as – declaration keyword
type – may take values: logical, short, long, real, and double
A.1.1. Types of Variables
Logical variables
Logical variables take on values of T or F. In addition, values of 0 or any real number
may be assigned to logical variables. A numeric value of 0 will be converted to F
prior to assignment, while other numbers will be converted to T.
Short variables
Short variables have values in the range -32,768 to 32,767. They are also type
INTEGER(2) in FORTRAN. The syntax for the declaration also allows the use of
INTEGER(2) or INTEGER*2 keywords.
Long variables
Long variables have values in the range -2,147,483,648 to 2,147,483,647. They are
also type INTEGER in FORTRAN. The syntax for the declaration also allows the use
of INTEGER, INTEGER(4) or INTEGER*4 keywords.
Real variables
Holds signed IEEE 32-bit (4-byte) single-precision floating-point numbers ranging in
value from -3.4028235E+38 through -1.401298E-45 for negative values and from
1.401298E-45 through 3.4028235E+38 for positive values. The syntax for the
declaration also allows the use of SINGLE, REAL(4), or REAL*4 keywords.
Double variables
Holds signed IEEE 64-bit (8-byte) double-precision floating-point numbers ranging
in value from -1.79769313486231570E+308 through -4.94065645841246544E-324
for negative values and from 4.94065645841246544E-324 through
1.79769313486231570E+308 for positive values. The syntax for the declaration also
allows the use of REAL(8) or REAL*8 keywords.
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