Pass or Fail condition - what if cell is blank?

[kenneth kam chuh21426993]

I have a rule for a product to pass or fail to be used.

The rule is if >30, then the product is failed and if <= 30, the product is passed.

I have the following script that works well.

var pf1 = this.getField("Product").value
if (Number(pf1)<=30){event.value = "Pass";}

if (Number(pf1)>30){event.value = "Fail";}

However, when I leave the cell unfilled, then the default of this product is set as "Pass" and I don't want this. I want the default setting as "" (blank) when the cell does not contain any number. 

Anyone can help me with this? Cheers

[Nesa Nurani · Accepted solution]

You can use like this:

var pf1 = Number(this.getField("Product").valueAsString);
if(pf1){
 if(pf1<=30)
 event.value = "Pass";
 else
 event.value = "Fail";}
else
event.value = "";

[kenneth kam chuh21426993]

Thanks heaps! This works perfectly.

Can you explain what is the purpose of the first if(pf1){  

if(pf1){ if(pf1<=30)
 event.value = "Pass";
 else
 event.value = "Fail";}
else
event.value = "";

[try67]

Can the value of the cell be zero?