Propositions for the control
of program flow
1.- PROPOSITION IF - ELSE
This statement is used to execute certain
program statements, if an expression is TRUE
or another group of sentences, if it is FALSE.
Its literal interpretation would be: IF it is
SOME thing, do another, if it is not skipped.
2.- SWITCH PROPOSITION
The SWITCH is a simple way to avoid long,
tedious and confusing nesting of ELSE-IF.
Suppose we are implementing a Menu, with
several possible choices.