?

Purpose

Evaluate expression and output result

Syntax

? <exp> [,<exp>] | ?? <exp> [,<exp>]

[AT <expN>]

[FUNCTION <expC1>]

[PICTURE <expC2>]

[STYLE <expC3>]

See Also

??, ECHO, Lianja System Object, SET DEBUGOUT, SET SPACE, TRANSFORM(), WRITEOUTPUT()

Description

The ? command outputs a carriage return, then a line feed, then evaluates each expression in turn and displays the result. The ?? command evaluates the expression and displays the results on the same line, no carriage return/line feed sequence is output. If more than one expression is specified and SET SPACE is ON, a single space is output between each expression. If SET SPACE is OFF, the expressions are output with no space in between.

Clause	Description
AT <expN>	You may optionally specify the column at which the expression will be output with the AT <expN> clause.
PICTURE <expC1>	The PICTURE clause supports all picture template symbols listed in the @...SAY command.
FUNCTION <expC2>	The FUNCTION qualifier allows picture functions to be specified. Normally this can be done with the PICTURE qualifier by preceding the picture with '@'. If the FUNCTION qualifier is used the '@' is not needed.
STYLE <expC3>	The STYLE qualifier has been added for compatibility with other Xbase languages.

From v8.0 the ? > command can be used in server-side Lianja Server Pages in Web Apps to assist in debugging.

Add the set debugout on command to the .rsp script along with ? > statements then open the App in the browser using Preview live in browser. The ? > display can then be monitored in the App Builder Console workspace.

The ? > command supports arrays and objects just like the ? command.

Example

? "price" at 01 picture "@!",1234.56 picture "$99,999.99"
PRICE $1,234.56
 
// Lianja/VFP Server Page (.rsp) example
set debugout on
Lianja.writeoutput("Write this to the debug_server file")
writeOutput("Write this to the App Builder Console workspace")
? > m_database
? > _args
set debugout off