Underscore Symbol

_
Symbol Format Data
_ Code Point
U+005F
TeX
\_
SVG
All symbols

Usage

The underscore or low line character is used in math typesetting systems to denote a subscript expression. For example, the expression below uses the underscore character to

x_1

This input is rendered as the following.

Related

symbol.dark.svg

The backward slash symbol "\" is primarily used in computing and programming as an escape character. In mathematics, it can be used to denote set difference or to separate lines in a multiline equation or matrix in LaTeX.