Subtract

See Also: Add, Decrement, Increment, Move

Purpose

To perform subtraction.

Syntax

subtract value from variable

What It Does

The subtract command subtracts value from variable. Value can be a constant, a number, or an expression.

The following two lines of code are the same:

Move (invoice.amount - vendor.total_due) to vendor.total_due

Subtract invoice.amount from vendor.total_due

 

The subtract and add commands are often used in the data-dictionary procedures Update and Backout as follows:

Procedure Update

    Forward Send Update

    Add invoice.amount to vendor.total_due

End_Procedure

 

Procedure Backout

    Forward Send Backout

    Subtract invoice.amount from vendor.total_due

End_Procedure