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1. How can we pass data secretly through a form?
With Session variables.
With "hidden" input fields.
2. What does type="hidden" do to a form field?
Changes it's size.
Turns it into a Session Variable component.
Hides it from view on the web page.
3. What's a quick way to test if the form has already been submitted?
An if statement on our num1 variable?
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