is an option for Dialog that can give an expression to evaluate before the dialog starts.
DialogProlog
is an option for Dialog that can give an expression to evaluate before the dialog starts.
Details
- You must use a delayed rule of the form DialogProlog:>expr to prevent expr from evaluating prematurely.
- Expressions given by DialogProlog are evaluated after symbol values are localized and before any expression given as the argument of Dialog is evaluated.
Examples
Basic Examples (1)
Enter a dialog, first printing out the stack:
Return from the dialog:
See Also
Tech Notes
-
▪
- Dialogs
History
Introduced in 1991 (2.0)
Text
Wolfram Research (1991), DialogProlog, Wolfram Language function, https://reference.wolfram.com/language/ref/DialogProlog.html.
CMS
Wolfram Language. 1991. "DialogProlog." Wolfram Language & System Documentation Center. Wolfram Research. https://reference.wolfram.com/language/ref/DialogProlog.html.
APA
Wolfram Language. (1991). DialogProlog. Wolfram Language & System Documentation Center. Retrieved from https://reference.wolfram.com/language/ref/DialogProlog.html
BibTeX
@misc{reference.wolfram_2025_dialogprolog, author="Wolfram Research", title="{DialogProlog}", year="1991", howpublished="\url{https://reference.wolfram.com/language/ref/DialogProlog.html}", note=[Accessed: 09-January-2026]}
BibLaTeX
@online{reference.wolfram_2025_dialogprolog, organization={Wolfram Research}, title={DialogProlog}, year={1991}, url={https://reference.wolfram.com/language/ref/DialogProlog.html}, note=[Accessed: 09-January-2026]}