[Tex/LaTex] How to write checkmark in latex

symbols

I want to put some checkmarks inside table cells.

I have put a cross sign using $\times$ but I really don't know how to write a checkmark in latex.

I used \usepackage{bbding} package and \checkmark but it doesnt work,

if it is \checkmark, it shows nothing

if it is \Checkmark, it shows a !

an example source code:
(there is an additional cls file IEEEtran.cls : mirrors.ctan.org/macros/latex/contrib/IEEEtran/IEEEtran.cls)

    \documentclass[conference]{IEEEtran}

    \ifCLASSINFOpdf
       \usepackage[pdftex]{graphicx}
       \DeclareGraphicsExtensions{.pdf,.jpeg,.png,.eps}
    \else
       \usepackage[dvips]{graphicx}
       \DeclareGraphicsExtensions{.eps}
    \fi



    \usepackage{lscape}
    \usepackage{subfigure}
    \usepackage{dingbat}

    \begin{document}

    \title{0000}

    \author{\IEEEauthorblockN{00000}}


    \maketitle


    \begin{abstract}
    \end{abstract}

    \IEEEpeerreviewmaketitle

    \section{0000}
    ffffffffffff \Checkmark


    \begin{thebibliography}{1}

    \end{thebibliography}

    \end{document}

Best Answer

Without PSTricks.

\documentclass[preview,border=12pt,varwidth]{standalone}
\usepackage{tikz}
\def\checkmark{\tikz\fill[scale=0.4](0,.35) -- (.25,0) -- (1,.7) -- (.25,.15) -- cycle;} 
\begin{document}
This is a \checkmark checkmark.
\end{document}

enter image description here