Understanding Algorithms: Definition, Expression, and Importance
Explore the concept of algorithms, their significance, and how to express them effectively. Discover the connection between algorithms and computer programs through clear instructions and definitions. Learn the ways to describe algorithms in different languages and enhance precision in problem-solving.
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Presentation Transcript
What is an algorithm? An algorithm is a sequence of unambiguous instructions for solving a problem, i.e., for obtaining a required output for any legitimate input in a finite amount of time. 2 problem algorithm input output computer
What is an algorithm? 3 Algorithms are the ideas behind computer programs. An algorithm is the thing that stays the same regardless of programming language and the computing hardware 5/29/2025
What is an algorithm? (cont) 4 An algorithm is a precise and unambiguous specification of a sequence of steps that can be carried out to solve a given problem or to achieve a given condition. An algorithm accepts some value or set of values as input and produces a value or set of values as output. Algorithms are closely intertwined with the nature of the data structure of the input and output values 5/29/2025
How to express algorithms? 5 Increasing precision Nature language (e.g. English) Pseudocode Real programming languages Ease of expression Describe the ideas of an algorithm in nature language. Use pseudocode to clarify sufficiently tricky details of the algorithm. 5/29/2025
How to express algorithms? 6 Increasing precision Nature language (e.g. English) Pseudocode Real programming languages Ease of expression To understand / describe an algorithm: Get the big idea first. Use pseudocode to clarify sufficiently tricky details 5/29/2025
What is a program? How to cook? The algorithm Are you a programmer?
Pseudocode This is the pseudocode for a game of Monopoly
Hey Jude "Hey Jude" is a song by the English rock band the Beatles, written by Paul McCartney and credited to Lennon McCartney.
