Y: input field. Acceptable formats include: integers, decimal, or the E-notation form of scientific notation, i.e. 23E18, 3.5e19, etc.
When the user clicks buttons:
• If "X" is invalid, Message Box will be shown "Please provide a valid X value!".
• If "Y" is invalid, Message Box will be shown "Please provide a valid Y value!".
• If the user clicks the "X + Y" button:
The system displays the results of the ("X" + "Y") expression value in "Resulf".
If the user clicks the "X - Y" button:
The system displays the results of the ("X" - "Y") expression value in "Resulf".
If the user clicks the "X x Y" button:
The system displays the results of the ("X" x "Y") expression value in "Resulf".
• If the user clicks the "X/Y" button:
If "Y" = 0, Message Box will be shown "Please provide a non-zero Y value!".
The system displays the results of the ("X" / "Y") expression value in "Resulf".
If the neer clicke the "YAV" button
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