WOLFRAM

Wolfram Language & System Documentation Center

UnderBar[expr]

displays with a bar under expr.

Details
Details and Options Details and Options
Examples  
Basic Examples  
Properties & Relations  
See Also
Tech Notes
Related Guides
History
Cite this Page

UnderBar

UnderBar[expr]

displays with a bar under expr.

Details

  • UnderBar[expr] can be entered using and .
  • UnderBar[expr] remains unchanged by evaluation.
  • The bar extends the full length of expr.

Examples

open all close all

Basic Examples  (2)

Wolfram Language code: UnderBar[x + y]

Type and then to enter directly:

Wolfram Language code: Underscript[v, _]

Properties & Relations  (1)

UnderBar is effectively a special case of Underscript:

Wolfram Language code: {UnderBar[x], Underscript[x, RawBoxes["_"]]}

if the output is used as input, both expressions standardize to UnderBar:

Wolfram Language code: {Underscript[x, _], Underscript[x, _]}//InputForm
Wolfram Research (2007), UnderBar, Wolfram Language function, https://reference.wolfram.com/language/ref/UnderBar.html (updated 2020).

Text

Wolfram Research (2007), UnderBar, Wolfram Language function, https://reference.wolfram.com/language/ref/UnderBar.html (updated 2020).

CMS

Wolfram Language. 2007. "UnderBar." Wolfram Language & System Documentation Center. Wolfram Research. Last Modified 2020. https://reference.wolfram.com/language/ref/UnderBar.html.

APA

Wolfram Language. (2007). UnderBar. Wolfram Language & System Documentation Center. Retrieved from https://reference.wolfram.com/language/ref/UnderBar.html

BibTeX

@misc{reference.wolfram_2026_underbar, author="Wolfram Research", title="{UnderBar}", year="2020", howpublished="\url{https://reference.wolfram.com/language/ref/UnderBar.html}", note=[Accessed: 13-June-2026]}

BibLaTeX

@online{reference.wolfram_2026_underbar, organization={Wolfram Research}, title={UnderBar}, year={2020}, url={https://reference.wolfram.com/language/ref/UnderBar.html}, note=[Accessed: 13-June-2026]}