Chapter 2: Algorithm and Flowchart – Activity - 1 (Class VI)

Activity 1: Algorithm and Flowchart

Understanding the Building Blocks of Logic

1. Algorithm Definition

An algorithm is a finite, step-by-step set of unambiguous instructions designed to solve a specific problem or perform a task. It takes input, processes it, and produces a desired output within a finite time. Think of it as a precise recipe.

Key Characteristics:

• Finiteness: Must terminate after a finite number of steps.
• Definiteness: Each step is precisely and unambiguously defined.
• Input: Has zero or more well-defined inputs.
• Output: Has one or more well-defined outputs.
• Effectiveness: Each operation is sufficiently basic and executable.

2. Flowchart Definition

A flowchart is a graphical representation of an algorithm or process. It uses standardized symbols and flowlines to visually depict the sequence of operations, decision points, and the overall flow of control, making complex processes easier to understand and document.

Key Benefits:

• Clear Communication: Visual, easy to understand.
• Effective Analysis: Helps identify issues and inefficiencies.
• Proper Documentation: Useful for maintenance and development.
• Efficient Coding: Aids in program logic development.
• Efficient Debugging: Helps identify errors more easily.

3. Flowchart Symbol Table with Description

Symbol	Name	Description
🔲	Terminal (Start/End)	Represents the beginning or end of a flowchart. Often labeled "Start" or "End".
◻️	Process Box	Represents a specific operation, action, or processing step (e.g., calculations, data manipulation).
⬜	Data Box (Input/Output)	Represents any operation involving inputting data (e.g., reading from keyboard) or outputting data (e.g., displaying on screen).
🔶	Decision Box	Represents a point where a decision needs to be made (e.g., "Yes/No" question), with branches for different outcomes.
➡️	Flowline	Indicates the direction of flow and connects the different symbols in the flowchart.
🔵	Connector	Used to connect different parts of a flowchart, especially when it spans multiple pages or avoids messy lines.

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