In the provided Lua script, the function demo_generator() is only called once and the result is stored in the variable VariableB. However, you may be concerned about how the value of VariableB is being used and the potential misunderstanding that the function is being called twice.
Here’s a breakdown of the code behavior:
First call to demo_generator(): The function is called once at the beginning and stores the generated result in VariableB. This is done when you assign VariableB = demo_generator().
HTML generation: The value of VariableB is then used in the HTML content in the line ]] .. VariableB .. [[. This means that VariableB (which holds the sum of num1 and num2 generated by demo_generator()) is dynamically inserted into the HTML.
Handling POST Request: After the user submits the form, the script checks if the request method is POST. If it is, it reads the submitted value from the input field digs and compares it with the original value of VariableB (which is stored in the variable). It then prints both the submitted value and the original value.
Why might you think it's called twice?
The potential confusion could arise because:
The VariableB value is used in the HTML output and compared in the POST request handling section.
However, demo_generator() is only called once, at the point where VariableB is initially assigned. The value of VariableB does not change unless the function is explicitly called again.
Possible Solution for Calling demo_generator() Twice
If your intent is to generate a new random value each time the form is submitted (so that the function is called both when the page is first generated and when the form is submitted), you should call the function demo_generator() again when handling the POST request.
