\documentclass{minimal}
\usepackage{ifthen}
\usepackage{intcalc}

\newcounter{mycount}
\newboolean{fizzOrBuzz}

\newcommand\fizzBuzz[1]{%
\setcounter{mycount}{1}\whiledo{\value{mycount}<#1}
    {
	\setboolean{fizzOrBuzz}{false}
	\ifthenelse{\equal{\intcalcMod{\themycount}{3}}{0}}{\setboolean{fizzOrBuzz}{true}Fizz}{}
	\ifthenelse{\equal{\intcalcMod{\themycount}{5}}{0}}{\setboolean{fizzOrBuzz}{true}Buzz}{}
	\ifthenelse{\boolean{fizzOrBuzz}}{}{\themycount}
	\stepcounter{mycount}
	\\
    }
}

\begin{document}
    \fizzBuzz{101}
\end{document}