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ABL Reference
ABL Syntax Reference : IF...THEN...ELSE function

IF...THEN...ELSE function

Evaluates and returns one of two expressions, depending on the value of a specified condition.


IF condition THEN expression1 ELSE expression2
An expression whose value is logical (TRUE or FALSE).
A constant, field name, variable name, or expression. If the condition is TRUE, then the function returns this value.
A constant, field name, variable name, or expression whose value is of a data type that is compatible with the data type of expression1. If the condition is FALSE or the Unknown value (?), then the function returns this value.


You can use the IF . . . THEN . . . ELSE function when you want to sort records in an unusual order. In this example, the Customers are sorted so that those with a Balance greater than $10,000 appear first, then those with Balances between $1,000 and $10,000, and finally those with Balance of $1,000 or less:
FOR EACH Customer NO-LOCK BY IF Customer.Balance > 10000 THEN 1
ELSE (IF Customer.Balance > 1000 THEN 2 ELSE 3) BY Customer.SalesRep:
DISPLAY Customer.SalesRep Customer.Balance Customer.Name.