Types of Algorithms

The algorithm and flowchart, classification into the three types of control structures. They are:

1. Sequence

2. Branching (Selection)

3. Loop (Repetition)

These three control structures are sufficient for all purposes.

Sequence

The sequence is exemplified by sequence of statements place one after the other – the one above or before another gets executed first. In flowcharts, sequence of statements is usually contained in the rectangular process box.

1. Find the area of a Circle of radius r. 

Inputs to the algorithm: Radius r of the Circle.

Expected output: Area of the Circle

Algorithm:

Step1: Read\input the Radius r of the Circle

Step2: Area = PI*r*r // calculation of area

Step3: Print Area

2. Write an algorithm to read two numbers and find their sum. 

Inputs to the algorithm: First num1. Second num2.

Expected output: Sum of the two numbers.

Algorithm:

Step1: Start 

Step2: Read\input the first num1. 

Step3: Read\input the second num2. 

Step4: Sum num1+num2 // calculation of sum 

Step5: Print Sum 

Step6: End 

3. Convert temperature Fahrenheit to Celsius 

Inputs to the algorithm: Temperature in Fahrenheit 

Expected output: Temperature in Celsius 

Algorithm:

Step1: Start

Step 2: Read Temperature in Fahrenheit F

Step 3: C 5/9*(F32)
Step 4: Print Temperature in Celsius: C

Step5: End