Understanding Operators

Operators determine how the information in a variable(s) should be evaluated in an expression.

There are several different types of operators - arithmetic, comparison and logical. Each has their own purpose. Arithetic operators are used to perform basic mathematical operations such as adding and subtracting. Comparison operators are used for relational and equality analysis in an expression. Finally the logical operators allows us to perform complex logical expressions.

The data type (numeric, string or boolean) will also be a factor in determining what operator you'll use. Here are some quick examples to get you in the mood:

Set Variable: "fname" = "Fred"
Set Variable: "lname" = "Wahid"
Set Variable: "salary" = 500
Set Variable: "salary" = 500
Set Variable: "overtime" = 120


Set Variable: "pay" = salary + overtime

If (overtime > 300)
    Go to and Play("toomuch")
End If

If (fname ne "")
    Set Variable: "fullname" = fname & " " & lname
End If

Let's begin with Numeric Operators...