Is there any way I can define a variable in LaTeX?

Question

In LaTeX, how can I define a string variable whose content is used instead of the variable in the compiled PDF?

Let\'s say I\'m writing a tech doc on a software and

Answer 1

Use \def command:

\def \variable {Something that's better to use as a variable}

Be aware that \def overrides preexisting macros without any warnings and therefore can cause various subtle errors. To overcome this either use namespaced variables like my_var or fall back to \newcommand, \renewcommand commands instead.