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Asked: 2026-05-15T11:41:02+00:00

I start by defining a command to store the string Hello: \newcommand{\textstring}{Hello} I would

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I start by defining a command to store the string “Hello”:

\newcommand{\textstring}{Hello}

I would like to append the string ” world” but unfortunately this code causes an error:

\renewcommand{\textstring}{\textstring world}
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1 Answer

  1. Editorial Team

    You can accomplish this by using \expandafter. For example:

    % redefine \textstring by appending " world" to it
\expandafter\def\expandafter\textstring\expandafter{\textstring { }world}

    If you don’t use \expandafter then you end up with a recursion problem. You can read more about it here.

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