Progress
Language Tutorial
for Character


Summary

An expression is a combination of 4GL language elements that results in a value. At a minimum, an expression consists of one operand, but can include multiple operands, operators, and functions.

An operand is a language element that represents a value. Operands include:

An operator is a language element that represents an action carried out on one or more operands.

An operation, is the successful combination of operands and operators that results in a value.

A function is a prewritten program that performs a specific task and returns a value. There are two types of functions in Progress: pre-defined functions that Progress provides and user-defined functions that you can create.

Arrays are fields or variables that contain multiple data elements. The extent of an array is the number of elements it contains.


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