Control statements and blocks

The usual if-else, while, for control keywords are available in QED.

As in C or Java, braces {} are used to delimit multiple-line blocks. There is no need for a set of braces when a block consists of a single statement. Also, blocks define scoping rules for variables and functions. Empty blocks must be explicitly defined using {} (a semicolon after a control statement won’t work).

The only caveat is there is no break statement in QED as of this writing. Also the switch-case statement is not yet implemented.