### Algorithm and Data structure (Lecture # 4)

Algorithm:

A step by step solution to a problem is called algorithm A typical programming task can be divided into two phases.

1)Problem Solution Phase

Produce an ordered sequence of steps that deserve solution of problem.

This sequence of steps is called an algorithm. 2)Implementation Phase

Implement the program in some programming language.

- First produce a general algorithm (one can use pseudo code) 3)Pseudo code

Pseudo code is an artificial and informal language that helps programmer develop an algorithm

Pseudo code is very similar to everyday English

- And algorithm is a step by step solution of a specific mathematical or computer related problem.

1.Formal style algorithm

Heading of algorithm Step by step algorithm - - - Exit

2.Informal style algorithm

Step # 2 Defined in English - - - Step # n Finish/Exit

Computation…

A step by step solution to a problem is called algorithm A typical programming task can be divided into two phases.

1)Problem Solution Phase

Produce an ordered sequence of steps that deserve solution of problem.

This sequence of steps is called an algorithm. 2)Implementation Phase

Implement the program in some programming language.

- First produce a general algorithm (one can use pseudo code) 3)Pseudo code

Pseudo code is an artificial and informal language that helps programmer develop an algorithm

Pseudo code is very similar to everyday English

- And algorithm is a step by step solution of a specific mathematical or computer related problem.

**Approaches to write algorithm**

There two different approaches to written algorithm1.Formal style algorithm

Heading of algorithm Step by step algorithm - - - Exit

2.Informal style algorithm

**It is written in a human language e.g, English suits a pure pseudo code**

**e.g,**Step # 1 Defined in EnglishStep # 2 Defined in English - - - Step # n Finish/Exit

Computation…