Advertisements
IF()
Return the result of an expression based on a condition
------------------------------------------------------------------------------
Syntax
IF(<lCondition>, <expTrue>, <expFalse>) --> Value
Arguments
<lCondition> is a logical expression to be evaluated.
<expTrue> is the value, a condition-expression, of any data type,
returned if <lCondition> is true (.T.).
<expFalse> is the value, of any date type, returned if <lCondition>
is false (.F.). This argument need not be the same data type as
<expTrue>.
Returns
IF() returns the evaluation of <expTrue> if <lCondition> evaluates to
true (.T.) and <expFalse> if it evaluates to false (.F.). The value
returned is the data type of the valid condition-expression.
Description
IF() is a logical conversion function. It is one of the most powerful
and versatile functions in Clipper. It provides a mechanism to
evaluate a condition within an expression. With this ability you can
convert a logical expression to another data type.
Examples
. This example converts a logical data value to a numeric data
value:
lPaid = .T.
? IF(lPaid, 1, 0) // Result: 1
. In this example a logical field is formatted depending on
whether the Customer is past due or not:
@ ROW() + 1, 25 SAY IF(lPaid, SPACE(10), "Go get 'em")
. If you are printing forms, you can print an indicating symbol
in different columns depending on the value of a logical field:
@ ROW(), IF(InHospital, 10, 12) SAY "X"
. You can also use IF() to force the LABEL FORM to print blank
lines. Enter the following expression when you create the label with
RL.EXE:
IF(EMPTY(Company), CHR(255), Company)
Files Library is CLIPPER.LIB.
Note : IF() is synonymous (shorthand) of IIF().
Advertisements