|
|
|
|
|
An expression is a combination of constants, variables and operators that yield new values. When a script runs, you can evaluate an expression, and inspect and save the value, by assigning it to a variable. MaxBasic expressions are composed of operands (variables, object properties or sub-expressions) and operators. The value of an expression can be a number, a string, a Boolean value (True or False) or Null (not valid).
Constant Strings in Expressions
Strings in expressions must be in double Quotes. The following is a valid string constant: "Accredo Business Software".
Constant Dates in Expressions
A date constant is a valid date enclosed in the # character. The date will be interpreted in terms of the Windows date format (for example, for ordering of day and month). The following is a valid date constant: #31/10/2025#.
MaxBasic Expression Examples
In the examples it is assumed a Customer object called Customer exists.
Expression |
Description |
|---|---|
1 |
Numeric constant, returns 1 |
1.5 |
Numeric constant, returns 1.5 |
"Accredo" |
String constant, returns "Accredo" as a string |
True |
Logical constant, returns True |
1 + 2 |
Numeric calculation, returns 3 |
2 * (3 + 2.5) |
Numeric calculation, returns 11 |
"Accredo" & " is great" |
String calculation, returns "Accredo is great" |
Customer.CustomerName |
Returns the value of the CustomerName property in the Customer object |
Customer.CustomerName & " " & Customer.ContactName |
Concatenates the CustomerName, a blank and the ContactName |
Balance3 + Balance2 |
Numeric calculation – adds the value of Balance3 and Balance2 variables |
"Printed " & Date |
String calculation |
"Amount paid is " & Customer.AmountOfLastReceipt |
String calculation. Converts the Amount of Last Receipt for a Customer into a string and concatenates to the string "Amount paid is " |
IIF(Customer.SalesYearToDate > 10000, "Priority Customer", "Customer") |
Returns "Priority Customer" if the Customers Sales Year To Date is greater than 10000, or returns "Customer" |