Text Formatting ⇒ One command for "bold" both in text and math mode

[Alextorm]

How can I define one new command to have the text formatted in bold both in math and in text mode?

[svend_tveskaeg]

Why a single command? I would simply use \textbf for bold text and \mathbf for bold mathematics.

[yoriz]

I agree it can be useful sometimes. I sometimes put the following in my preamble:

Code: Select all

\let\oldtextbf=\textbf
\renewcommand\textbf[1]{{\boldmath\oldtextbf{#1}}}

This code adds an additional \boldmath call to the \textbf command, making all math within a \textbf{} bold. Of course, if you don't want to overwrite \textbf, you can define a new command:

Code: Select all

\newcommand\allbold[1]{{\boldmath\textbf{#1}}}

Yori

[Alextorm]

I had in mind something like an "if-then" construction ("if math environment do math bold, if text environment do text bold"), but yoriz solution is just perfect for me.

Thanks to all.

[localghost]

I had in mind something like an "if-then" construction ("if math environment do math bold, if text environment do text bold"), but yoriz solution is just perfect for me.[…]

You can implement it in exactly that way.

Code: Select all

\documentclass[11pt,a4paper]{article}
\usepackage[T1]{fontenc}
\usepackage[utf8]{inputenc}

\newcommand*{\genbf}[1]{\ifmmode\mathbf{#1}\else\textbf{#1}\fi}

\begin{document}
  \genbf{In-line text}
  \[
    \genbf{Math}
  \]
\end{document}