What is an Algorithm

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An algorithm is a set of step by step instructions for solving a problem to achieve a result.

Important charecteristics of an algorithm

• An algorithm is well orderd
• An algorithm has unambiguous operations
• An algorithm has effectively computable operations
• An algorithm produces a result
• An algorithm halts in a finite amount of time

Representation of Algorithms

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Flow charts

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Example 01

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Example 02

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Write an algorithm for adding all even numbers between 2 and 1000 to sum Even numbers

• Initialize Sum-of-even numbers
• Initialize an index
• Repeat Until index is 1000
• Increment the index by 2;
• Add index to sum-of-even-numbers

In Pseudo code

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Sum-of -Even-numbers=0

Number=0

Repeat

Number=Number+2

Sum-of-Even-numbers=Sum-of-Even-numbers +Number

Util Number==10