I need help with a custom Calculation script

Question

I'm making an order form for levels in a supply room. I have a set inventory level say 10. I have a text box to input the level currently on hand. I need to perform a calculation of the difference of the two numbers. That part is easy. I think. So if the level currently on hand is blank then I want the amount to order to be blank or if the amount on hand is equal to our over the amount allowed then it will also be blank. If that makes since. So I was trying to use:

var A = this.getField("Text2");

var B = 10

var D = ((var B - var A))

But I got a syntex error that I can't figure out and then there is the if statements for the blank text fields. If someone could help I would appreciate it.

Thanks

Nesa Nurani · Accepted Answer

In that case, just change: A == B to: A >= B

Nesa Nurani · Answer

You can try this:var A = Number(this.getField("Text2").valueAsString);var B = 10;if(A == 0 || A == B)event.value = "";elseevent.value = B-A; What should happen if someone enters more then (B) 10, it should show negative number?

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