what and why we use algorithm (akhtar abbas)

8/13/2019 What and Why We Use Algorithm (Akhtar Abbas)

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What is Algorithm?

Algorithm

algr () m/

Noun

Noun: algorithm; plural noun: algorithms

a process or set of rules to be followed in calculations or

other problem-solving operations, especially by a

computer.


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"a basic algorithm forMultiplication"


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Origin


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late 17th cent. (denoting the Arabic or decimal

notation of numbers): variant (influenced by

Greek arithmosnumber) of

Middle English algorism,

via Old French from medieval Latin algorismus. The

Arabic source, al-wrizmthe man of wrizm (nowKhiva), was a name given to the 9th-cent.

mathematician Ab Jafar Muhammad ibn Msa,author of widely translated works on algebra and

arithmetic


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Why we need the

techniques for

algorithm designand algorithm

analysis?


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So you want to be a computer scientist?


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Is your goal to be a mundane programmer?


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Or a Great Leader and thinker?


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Original Thinking

Boss Assigns a Task# Given todays prices of Chicken, bread, Ketchup# Given constraints on what constitute a ZINGER

# Makes the cheapest ZINGER!

Everyday Industry ask these questions..


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Case 1 - Your Answer# Um? Tell me what to code.

With more suffocated software engineering job

market, the demand for mundane programmer

will diminish.


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Case 2 - Your Answer# I learned this Algorithm that will work

Soon all known Algorithms will be available to

Libraries


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Case 3 - Your Answer# I can develop a new Algorithm for you.

Great thinkers will always be needed.


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The future belongs to thecomputer scientist who:

# understands the principles and

techniques needed to solve vast

array of unfamiliar problems that

arise in a rapidly changing field..


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Course Content

A list of algorithms.Learn their code.Trace them until you are convinced

that they work.

Implement them.

*We should teach people how to catch fish

themselves, not just give them a fish or two


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Advantages of Algorithm

It is a step-by-step rep. of a solution to a

given problem ,which is very easy to understand ithas got a definite procedure. it easy to first develop

an algorithm, &then convert it into a flowchart &

then into a computer program. it is independent of

programming language. it is easy to debug asevery step is got its own logical sequence.


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Dis-advantages of Algorithm

it is time consuming & cumbersome as an

algorithm is developed first which is convertedinto flowchart &then into a computer program.


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Difference b/w Flow Chart and Algorithm

Flow chart is very important tool for developing

algorithm and program . It is pictorial representationof step by step solution of a problem.

Programmer often uses it as a program planning

tool for visually organizing step necessary to solve aproblem. It uses boxes of different shapes that denotes

different type of instruction.

While making a flow chart a programmer need not

to pay attention on the elements of he programming

language ,he has to pay attention to the logic of

solution to the problem


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wheres,,,

the term algorithm refers to the logic. it is step

by step description how to arrive at the solution

to the problem. algorithm is define as sequence

of instruction that when executed in the specified

sequence the desired results are obtained .

The set of rules that define how a particular

problem can be solved in finite number of steps

is known as algorithm.

A good algorithm help us to create a goodprogram


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what and why we use algorithm (akhtar abbas)

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