Basic HTML Version

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    Step-by-Step Instructions

                      Step  1   Plan the Features
                         The calculator should:

                        o   Perform basic  arithmetic  operations  (addition,  subtraction,  multiplication  and
                           division).

                        o   Have a clear, user-friendly interface with buttons for numbers, operators and the
                           equal sign.
                        o  Display results on a screen or output box.

                      Step  2   Set Up the User Interface
                         Open App Lab on Code.org.

                         Go to Code.org > Projects > App Lab.

                         Design the Layout:
                        o   Add a Text Input Box (ID: display) to show user input and results (set it to read-only).

                        o  Add Buttons for numbers (0-9), operators (+, -, *, /), equal sign (=) and clear (C).

                        o  Assign unique IDs to each button (e.g., btn1, btnPlus, btnEquals, btnClear).

                        o  Arrange buttons in a grid format for ease of use.
                         Customize the Design:

                        o  Use colors, fonts and button styles to enhance visual appeal.

                        o  Add labels or placeholders for better clarity.

                      Step  3   Code the Calculator

                         Switch to Code Mode to add functionality to buttons.
                        A. Initialize Variables

                        B. Add event Listener for Mathematical Operations Buttons

                           o  Addition Button

                      150   Premium Edition-V

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