TAL Reference Manual

Expressions

TAL Reference Manual—526371-001

4-6

Examples of Arithmetic Expressions

Following are examples of arithmetic expressions:

var1 !operand

-var1 !- operand

+var1 * 2 !+ operand arithmetic-operator operand

var1 / var2 !operand arithmetic-operator operand

var1 * (–var2) !operand arithmetic-operator operand

2 * 3 + var / 2

2 * var * 4

Operands in Arithmetic Expressions

An operand consists of one or more elements that evaluate to a single value. Table 4-2

describes the operands that can make up an arithmetic expression.

Signed Arithmetic Operators

Signed arithmetic operators and the operand types on which they can operate are

shown in Table 4-3

on page 4-7

Table 4-2. Operands in Arithmetic Expressions

Element Description Example

Variable The identifier of a simple variable, array

element, pointer, structure data item, or

equivalenced variable, with or without @ or

an index

var[10]

Constant A character string or numeric constant 103375

LITERAL The identifier of a named constant file_size

Function

invocation

The invocation of a procedure that returns a

value

$LEN (x)

(expression) Any expression, enclosed in parentheses (x := y)

Code space item The identifier of a procedure, subprocedure,

or label prefixed with @ or a read-only array

optionally prefixed with @, with or without an

index

@label_a