User Guide

Operators

Axcess Programming Language

Operators

Changing and Comparing Values

In your Axcess program, you may need to increase the value of a variable, to see if that variable has

reached a certain value, or to compare different values to each other. The tools that you use to

perform these tasks are called operators. There are four types of operators in Axcess: arithmetic,

relational, logical, and bitwise.

Arithmetic Operators

Arithmetic operators create a numeric value from one or more operations, such as addition,

multiplication, and division. They are listed in the table below.

Here is an example of arithmetic operators in an Axcess program:

X = 7 + 5

Y = X * 3

In the example above, X = 12 and Y = 36. There is an order of precedence for arithmetic operators;

that is, some operations are performed first and others second. For example, multiplication

operations (*) are performed before addition operations (+).

Here is an example that illustrates this precedence:

X = 7 + 5 * 3

Reading this expression left to right, X = 36. However, since multiplication takes precedence,

X = 22 (5 * 3 = 15, and 7 + 15 = 22). For detailed information on precedence, refer to

the Precedence Among Operators section on page 51.

Relational Operators

Relational operators, compare two numeric values and produces a true or false result. These

operators are listed below.

Here is an example of these operators in practice:

Arithmetic Operators

Symbol Function Symbol Function

+Add / Divide

- Subtract % Modulus

* Multiply

Relational Operators

Symbol Function Symbol Function

< Less than <= Less than or equal to

> Greater than >= Greater than or equal to

= Equal to <> Not equal to