Switch

A switch block (also known as a case block, or select in the Fortran world) is a way of selecting from a range of alternatives according to the value of the input, effectively defining a piecewise function.

An example switch block with 3 cases

The default switch has two cases, and can be used to implement an if/then/else construct. However, because the two cases are 0 and 1, or false and true, a two case switch statement will naturally appear “upside down” to how you might think of an if statement. In other words, it looks like:

$\parbox{\textwidth}{ {\tt if not }{\em condition} {\tt then}\\ \ldots {\tt else}\\ \ldots }$

You can add or remove cases through the context menu.