\\ - LaTeX line break command

Renderer support

Package	MathJax	KaTeX	XeTeX
`base`	MathJax: Full	KaTeX: Full	XeTeX: Full
`textmacros`	MathJax: Full	KaTeX: Full	XeTeX: None

Syntax#

\\!s*star!o:L[1em]optional dimension

Argspec !s !o:L — two optional arguments. Same argspec in base and textmacros. Reading argspecs

\\ ends a row in align, cases, and matrix environments.

\begin{align} a &= b+c \\ &= d \end{align}

\sum_{\substack{1\le i\le n \\ i\neq j}} a_{ij}

\begin{pmatrix} a & b \\ c & d \end{pmatrix}

Package	Signature	Allowed mode	Notes
`base`	`!s !o:L`	math	—
`textmacros`	`!s !o:L`	text	—

TeXForm parses this entry as prefix syntax; the package determines its argument specification.

`base`
Input	Case	MathJax	KaTeX	XeTeX
`\\`	Positive · baseline	Pass	Pass	Pass
`\\*`	Positive · vary:s[0]	Pass	Pass	Pass
`\\[1pt]`	Positive · vary:o[1]	Pass	Pass	Pass
`\\*[1pt]`	Positive · maximal	Pass	Pass	Pass
`\\[a]`	Negative · neg:L[1]	Fail	Fail	Fail

`textmacros`
Input	Case	MathJax	KaTeX	XeTeX
`\\`	Positive · baseline	Pass	Pass	Fail
`\\*`	Positive · vary:s[0]	Pass	Pass	Fail
`\\[1pt]`	Positive · vary:o[1]	Pass	Pass	Fail
`\\*[1pt]`	Positive · maximal	Pass	Pass	Fail
`\\[a]`	Negative · neg:L[1]	Pass	Fail	Fail