Define variable and constant. State the difference between variable and constant. Why variable is important in programming?

SECTION 1 - In a written report (2000 words) complete the following:

PART A (UNDERSTANDING)

1. Define variable and constant. State the difference between variable and constant. Why variable is important in programming?

2. Explain data types and mention why it is necessary? Discuss about implicit and explicit type conversion with suitable examples.

3. Explain control structures in programming. Also, discuss how decision-making changes the flow of the execution. Describe the Boolean operations that can be used in decision-making.

PART B (INTERPRETATION)

The source code for an application has been provided in the appendix.

Run the code and describe how the application works, creating step by step instructions for using this application. Preferably, illustrate your answer with appropriate screen shots and diagrams e.g. flow charts.

Read and provide a line-by -line explanation of how the code for this application has been implemented. Take care to include a description of the concepts used including the arguments being passed, return types, etc.