# How to add a line break

Sometimes I need an empty line like this

If I write

$\Rightarrow \mathcal{I}_1 = \{\{A\}, \{B\}, \{C\}, \{E\}\}$
\\
Generierung der häufigen $2$-Itemsets:


I'll get an error "There's no line here to end".

$\Rightarrow \mathcal{I}_1 = \{\{A\}, \{B\}, \{C\}, \{E\}\}$
\\
Generierung der häufigen $2$-Itemsets:


This works, but I want to use a nicer solution...

How can I fix this??

-
I'm not sure you really want an “empty line”; probably you want that the equation is displayed, that is, set in $...$. “Empty lines” are mostly a consequence of using word processors, but they're rarely a good typographical device. –  egreg Dec 27 '13 at 10:07
As @egreg says, you never (as in 99%) need manual line breaks in running text. Instead learn to use displayed math when appropriate. IMO it is a mistake that users learn that  \\  and \newline can be used in the normal text. They almost always get it wrong. –  daleif Dec 27 '13 at 10:26

Try putting the equation in a displaymath or equation environment to create space before and after the equation.
\begin{displaymath}

If this question does not only refer to space after equations but skipping one line in general, maybe \vspace{\baselineskip} will serve your needs. This should generate vertical space in the size of one standard line of text.