# How do I indicate an en-dash while in math mode using LaTeX?

## How do I indicate an en-dash while in math mode using LaTeX?

The simplest way is to use `$S=1\mbox{--}2$`

. If you already have `\usepackage{amsmath}`

in your documents preamble, however, youre better off using `\text`

: `$S=1\text{--}2$`

because `\text`

will adjust the size of the font when used in super- and subscripts: `$S_{1\text{--}2}=0$`

.

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An en dash used in math may easily be confused with a minus sign. You may want to look at other techniques for indicating a range such as ellipses (`\ldots`

for dots on the baseline [used between commas], or `\cdots`

for centered dots [used between centered operators such as plus signs]) or using the bracket notation. Some examples:

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`$S = \{1, 2, \ldots, n\}$ indicates an element in the set containing integers between 1 and $n$.n$S = [0, 1]$ indicates a real number between 0 and 1 (inclusive).n`

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You can use `\textrm`

which does not depend on `\usepackage{amsmath}`

.nSome examples:

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`$S=1\textrm{--}2$n$S_{1\textrm{--}2}=0$ % correctly changes the font size for subscriptn$S_{1\textrm{2}2}=0$ % does not change the font size :(n`

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Or maybe use `\textnormal`

instead of `\textrm`

.nSee also LaTeX: use \textnormal instead of \textrm (or \textsf) in math.

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#### How do I indicate an en-dash while in math mode using LaTeX?

Well, you could use `$1\mbox{--}2$`

, but Id look at the list of math symbols in the symbol list. Hmm. I dont find one.

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