HP 3000 Manuals HP 3000 Manuals
Expressions
An expression is an operator with its operands or a function call. HP
Business BASIC/XL evaluates an expression and returns a result.
Syntax
{operand }
[operand] operator {func_name [(parameter [,parameter]...)]}
Parameters
operand First operand is required if operator is binary and not
allowed if operator is unary.
Each operand is one of the following:
* A literal.
* A variable name.
* An expression.
Operand type restriction depends on the operator.
operator Determines how the value(s) of the operands(s)
produce(s) the result.
func_name Function name. HP Business BASIC/XL supports the
following types of functions:
* Predefined function.
* Single-line user-defined function.
* Multi-line user-defined function.
parameter The number of parameters depends on the function. Each
parameter is one of the following:
* A literal.
* A variable name.
* An expression.
Parameter type restrictions are dependent on the types
of the function's formal parameters.
The result of an operation or a predefined function depends on the values
of the operands or parameters, but the values of the operands and
parameters do not change.
A user-defined function can change the values of its parameters if the
parameters are passed by reference.