Year 7 - Algorithm and Flowcharts (Revision Lesson)

Algorithms

and

Flowcharts

By Phil Collins - Year 7 - Linked to Unit 2 and Unit 11 Compute-IT BookKS3(1)

INTRODUCTION TO PROBLEM SOLVING

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Learning Objectives

1. Appreciate the concept of Algorithm

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2. Appreciate the concept of Flowchart

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3. Explain different symbols used in a flowchart

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4. Introduction of a Program.

Let us play a game: You have to solve the puzzle by writing only the below mentioned instructions:

• Move One Square Right

• Move One Square Left

• Move One Square Down

• Fill in Square with Color

Here we are using step wise procedure for doing our work.

NOW YOU SOLVE A SIMILAR PROBLEM BY USING THE SAME TECHNIQUE

Now Solve this question

Multiple Choice

1. Move One Square Right

2. Move One Square Left

3. Move One Square Down

4. Fill in square with colour

• 1->1->4->2->3->1->4

• 1->1->4->2->3->4

• 1->1->4->3->4

• 1->1->2->4->3->4

Now in place of writing the instructions in sentences we can use specific symbols to represent our instructions.

As for example in place of the lines we can use symbols

• Move one step Right we can use right arrow key

• Move one step Left we can use left arrow key

• Move one step up we can use up arrow key

• Move one step down we can use down arrow key

• And to color the box we can use the Z key.

FLOWCHART & ITS USES

In computer terminology the symbols used for representing the solution to a problem is called Flowchart.

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USES OF A FLOWCHART

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To specify the method of solving a problem

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To plan the sequence of a computer program.

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Communicate ideas, solutions etc.

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​You will find a full size copy of this in your Classroom

PROGRAM

When we code these instructions using some specific rules, and can be run by a computer it is called Program.

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