# Bold Italic Number

How to show the number 1 in bold italics math font? I tried using \bm{1} but the looks seems ain't any different from \bf{1}.

• note that \bf is not defined by default but if used the syntax would be {\bf 1} not \bf{1} \bm{\mathit{1}} probably does what you want. Nov 28 '21 at 10:57

\bm will make it bold, but you want \mathit to make it italic.
\documentclass{article}
$1 + \mathit{1} + \mathbf{1} + \bm{\mathit{1}}$