Display blank output when no computation was type

[avv98]

Hello,  I am creating a form and here is the situation:

I am getting the product of textfield1 and textfiled2 and display output on textfield3, already done that and works using Calculate tab on a textfield option  'Value is the product (x) of the ff. fields'. 

My Question is how do I get to display blank output when no numbers are typed in the computation textfields? (I dont want '0.00' to appear when I type nothing on '1' and '2')

please refer to the picture for reference:

[Nesa Nurani · Accepted solution]

Use this as 'Validation' script under 'Validate' tab:

if(event.value == 0) event.value = "";

[avv98]

I tried that script but dont work

the 0.00 is still there

I used the calculate tab 'value is the product of the following fields'

[avv98]

Although I found an article like this which you commented on:

https://community.adobe.com/t5/acrobat-discussions/how-to-display-blank-on-computed-field-instead-of...

which the solution was: (using custom calculation script)

var f1 = Number(this.getField("textfield1").valueAsString);
var f2 = Number(this.getField("textfield1").valueAsString);
if(f1&&f2)
event.value = f1/f2;
else
event.value = "";

thank you 

[Nesa Nurani]

Glad you found the solution, but my suggestion above work also, it's a validation script so to trigger it for first time, you need to change value of the field and then it will work.

[avv98]

ohh ok, already tried it but I need to type '0' in textfield1 or 2 since it needs a product (x) for it to activate blank text field (next to the field with 3.00 is the field in which I used your given script)

what I want is even there is no number input in the textfields the output textfield should be blank, and not showing '0.00'

[avv98]

ohhh sorry you're right it worked. I had to type in numbers first for it to activate, but the script from you worked the first time.