How to write checkmark in latex [duplicate]

Question

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}

Answer 1

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}

Answer 2

Several options:

\documentclass{article}
\usepackage{bbding}
\usepackage{pifont}
\usepackage{wasysym}
\usepackage{amssymb}

\begin{document}

% amssymb
\checkmark

% bbding
\Checkmark
\CheckmarkBold

% pifont
\ding{51}
\ding{52}

% wasysym
\CheckedBox

\end{document}

\documentclass{article}
\usepackage{dingbat}

\begin{document}

\checkmark

\end{document}

The MnSymbol package also offers \checkmark, but this package changes other symbols.

After the edit to the question:

\documentclass[conference]{IEEEtran}
\usepackage{dingbat}

\begin{document}

\title{0000}
\author{\IEEEauthorblockN{00000}}
\maketitle

\checkmark

\end{document}

(with dingbat it is \checkmark, lower case "c").

Answer 3

Since the check mark is a Unicode symbol (U+2714), you can also use XeLaTeX.

\documentclass{article}
\usepackage{fontspec}
\setmainfont{Linux Libertine O}
\begin{document}
✔
\end{document}

Answer 4

This is a scaleable version of the checkmark in the answer by PGFTricks above. I'm sure there's a better way though.

\documentclass[preview,border=12pt,varwidth]{standalone}
\usepackage{tikz}
\usepackage{calc}
\def\checkmark{\tikz\fill[scale=0.4](0,.35) -- (.25,0) -- (1,.7) -- (.25,.15) -- cycle;} 
\def\scalecheck{\resizebox{\widthof{\checkmark}*\ratio{\widthof{x}}{\widthof{\normalsize x}}}{!}{\checkmark}}
%that's defined it - now for a test

\begin{document}

This is a \checkmark checkmark.

\huge 
This is a huge \scalecheck checkmark in huge text.

\footnotesize
This is a footnotesize \scalecheck checkmark in footnotesize text.
\end{document}