Link to a named anchor
Place an anchor
### <a name="head1234"></a>A Heading for the entry!
where you want to link to and refer to it on the same page by
Highlight ruby code with line numbers
1 2 3 4 5 6 7 8 9 10 11 12 # Program to find the factorial of a number # Save this as fact.rb def fact(n) if n == 0 1 else n * fact(n-1) end end puts fact(ARGV.to_i)