April 2024
Intermediate to advanced
832 pages
29h 31m
English
Content preview from Design and Analysis of Algorithms
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Computation Models and Design by Refi nement 91
5.1 INTRODUCTION
The actual computation done when a computer program is executed on a computer, can in general, be
represented by two kinds of models:
Declarative Model Also called the Functional Model, this model is oriented towards specifi cation of how
various entities taking part in a computation are related. These relationships are expressed as functions. The
emphasis is on what is to be achieved rather than how to achieve it.
Imperative Model Also called the Structured Programming model, this model is generally given in terms
of an actual program in some computer programming language or a pseudo-code. The word ‘imperative’
denotes commands being given to some execution agent (a computer in ...
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