ISBLANK
Returns true/false based on whether the given value is blank/empty.
Syntax
ISBLANK(val)
Example
If price is NULL, then:
ISBLANK({{price}})returns: True
Notes
An easy way to check if a field has no answer
ISBLANK(val)
If price is NULL, then:
ISBLANK({{price}})returns: True
An easy way to check if a field has no answer