Basic Math Using Scripting

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Hi there. I’ve come across this basic math using scripting calculator –  https://help.surveygizmo.com/help/basic-math-using-scripting. Its very useful. Been reading a bit on the programming language lua used to create it and I have a question. The above is great if you want to do basic add, multiply, subtract etc. But if you want to create an if ruleset – e.g. https://www.lua.org/pil/4.3.1.html how would you go about writing it? In essence I want a person to enter a value in a text box and say if said number (lets call it a) is between x and y then a*z otherwise if a is between x and y then a*z otherwise a is between x and y then a*z etc etc. The code for the basic math using scripting is as follows

numberofshirts = getvalue(5) –Get value of first textbox
shirtprice = 0.002 –Replace 15 with amount of shirt

totalamountdue = (numberofshirts * shirtprice) –Multiply the first textbox times the shirt amount

setvalue(6,totalamountdue) –Change 6 to ID of Hidden Value or Textbox

 

Any ideas on how I can edit to do the above? 

Warren asked
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