BUILDING BLOCKS OF ALGORITHMS

we enumerate the basic actions and corresponding instructions used in a
computer system based on a Von Neuman architecture. We may recall that an
instruction is a notation for an action and a sequence of instructions defines a
program whereas a sequence of actions constitutes a process. An instruction is also
called a statement.

The following three basic actions and corresponding instructions form the basis of
any imperative language. For the purpose of explanations, the notation similar to
that of a high-level programming language is used.