CBSE Class 8 Computer Science Algorithm Notes

Official Class 8 Computer Science Revision Material: CBSE Class 8 Computer Science Algorithm Notes

Review targeted revision notes for Class 8 Computer Science with the CBSE Class 8 Computer Science Algorithm Notes. Built according to official educational guidelines for the 2026-27 academic year, these downloadable summaries for Algorithm support daily study and last-minute exam readiness.

Chapter-wise Concept Summaries: Algorithm

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Developing algorithm to solve particular problem
 
In mathematics and computer science, an algorithm is a step-by-step procedure for calculations. Algorithms are used for calculation, data processing, and automated reasoning.Algorithms resemble recipes. Recipes tell you how to accomplish a task by performing a number of steps.
For example, to bake a cake the steps are: preheat the
oven; mix flour, sugar, and eggs thoroughly; pour into a baking pan; and so forth.
 
Goals of Algorithm Study
 
• To develop framework for instructing computer to perform tasks
 
• To introduce notion of algorithm as means of specifying how to solve a problem
 
• To introduce and appreciate approaches for defining and solving very complex tasks in terms of simpler tasks;
 
Simple Questions based on Algorithm
 
Algorithm: Calling a friend on the telephone

Input: The telephone number of your friend.

Output: None
 
Steps:

1. Pick up the phone and listen for a dial tone
 
2. Press each digit of the phone number on the phone
 
3. If busy, hang up phone, wait 5 minutes, jump to step 2
 
4. If no one answers, leave a message then hang up
 
5. If no answering machine, hang up and wait 2 hours, then jump to step 2
 
6. Talk to friend
 
7. Hang up phone
 
Algorithm to create Maggie noddle:

Step 1: Start

Step 2: Take pan with water

Step 3: Put pan on the burner

Step 4: Switch on the gas/burner

Step 5: Put magi and masala

Step 6: Give two minutes to boil

Step 7: Take off the pan

Step 8: Take out the magi with the help of fork/spoon

Step 9: Put the Maggi on the plate and serve it

Step 10: Stop.
 
Algorithm: To find (a + b)2=(a + b)* (a + b)

Input: Two numbers a and b.

Output: Result of (a + b)2
 
Steps:

1. Take numbers a, b, c.
 
2. Input the values of a and b

3. C=a+b

4. Print c*c

Algorithm: To find Perimeter of rectangle

Input: Two numbers l and b.

Output: Result l*b

Steps:

  1. Take numbers l, b, c, d.
  1. Input the values of l and b
  1. c=l*b
  1. d=2*c
  1. Print d

Conditions in Algorithm

Algorithm: To check whether a person can vote or not

Input: A number age.

Output: Yes or No

Steps:

1. Take a number age.

2. Input the age of the person

3. If(age>=18) goto step 4

           Else

        Goto step 5

4. Print “You can vote”

5. Print “You can’t vote”

Algorithm: To give a bonus of Rs 1000 to those employees whose salary is more than Rs5000

Input: Salary.

Output: New Salary

Steps:

1. Take numbers salary and total.

2. Input the salary of the person

3. If(salary>=5000) goto step 4

              Else

          Goto step 5

4. total=salary+1000

5. total=salary+0

6. Print total

SUMMARY

1. An algorithm is a step-by-step procedure for calculations.

2. To develop framework for instructing computer to perform tasks os one of the goal of Algorithm.

EXERCISES

A. Short Answer Question

1. What is an algorithm?

2. Write few goals of an algorithm.?

3. Write an algorithm to find Area of square?

 

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Study Material and Revision Notes for Class 8 Computer Science Algorithm

Download Chapter Summary: Class 8 Computer Science Algorithm

Review targeted chapter notes for Class 8 Computer Science Algorithm. Built according to official CBSE guidelines, these summaries highlight high-yield topics frequently tested in school evaluations.

Concept Clarification for Algorithm

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Additional Study Resources for Class 8 Computer Science

Follow up your revision by attempting the interactive online Computer Science MCQ test and practice worksheets for this chapter to verify your mastery. All platform resources are free to access.

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You can download the teacher prepared revision notes for CBSE Class 8 Computer Science Algorithm Notes from StudiesToday.com. These notes are designed as per 2026-27 academic session to help Class 8 students get the best study material for Computer Science.

Are these Computer Science notes for Class 8 based on the 2026 board exam pattern?

Yes, our CBSE Class 8 Computer Science Algorithm Notes include 50% competency-based questions with focus on core logic, keyword definitions, and the practical application of Computer Science principles which is important for getting more marks in 2026 CBSE exams.

Do these Class 8 notes cover all topic-wise concepts for Computer Science?

Yes, our CBSE Class 8 Computer Science Algorithm Notes provide a detailed, topic wise breakdown of the chapter. Fundamental definitions, complex numerical formulas and all topics of CBSE syllabus in Class 8 is covered.

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