In this tutorial, we will cover the binomial coefficient in three ways using LaTeX.

First, I will use the `\binom`

command and with it the `\dbinom`

command for text mode.

```
\documentclass{article}
\usepackage{amsmath}
\begin{document}
$$ \binom{n}{k}=\frac{n!}{k!(n-k)!} $$
$$ \dbinom{8}{5}=\frac{8!}{5!(8-5)!} $$
% Use \tbinom command for text mode
$$ \tbinom{n}{k} $$
\end{document}
```

**Output : **

Second, I will use `{n\choose k}`

syntax to represent this symbol. You can use this syntax instead of using the `\binom`

command. In both cases, you will return the same output.

```
\documentclass{article}
\newcommand{\binomial}[2]{{#1\choose #2}}
\begin{document}
$$ {n\choose k}=\frac{n!}{k!(n-k)!}$$
% Use \newcommand for binomial coefficent
$$ \binomial{n}{k},\binomial{n^\prime}{k^\prime} $$
$$ \binomial{p}{q}=\frac{p!}{q!(p-q)!} $$
\end{document}
```

**Output : **

## Use \genfrac command for binomial coefficient in LaTeX

amsmath package contains an interesting command. In the first two arguments, you have to use left and right parentheses. And lastly, two arguments of binomial coefficient have to be used.

```
\documentclass{article}
\usepackage{amsmath}
\newcommand{\binomial}[2]{\genfrac{(}{)}{0pt}{}{#1}{#2}}
\begin{document}
$$ \genfrac{(}{)}{0pt}{}{n}{k}=\frac{n!}{k!(n-k)!} $$
% Use \newcommand for easy to write
$$ \binomial{a}{b},\binomial{p}{q} $$
\end{document}
```

**Output : **