I am just noticing that an **empty** integer number field cannot be tested for being empty: If I use the length( function, it returns **1**, and the value shown in the Formula Workshop is **0**.

# Empty Number Field Returns Value 0

**KJM**#1

**admin**#2

To test an integer number field for empty, use the `sizeof(`

function. This is exactly the same as Panorama 6, in fact, that is the reason the `sizeof(`

function exists. In Panorama 6 if you used the `length(`

function on a numeric field you would get a type mismatch error – Panorama X is a lot more forgiving so it converts the number to text and then returns the length.

**KJM**#3

I just saw that this is the same behavior as in Panorama 6.

Thanks for reminding me of the sizeof( function!