Activity › Forums › Salesforce® Discussions › How do I use Isblank in Salesforce? Salesforce® Discussions How do I use Isblank in Salesforce? Posted by Ratnesh on June 30, 2020 at 6:33 PM How do I use Isblank in Salesforce? Anuj replied 5 years, 11 months ago 2 Members · 1 Reply 1 Reply Anuj Member July 1, 2020 at 1:54 PM ISBLANK () function is used to check if the field has a value or not. If you use ISBLANK () function with a numeric field, the function only returns TRUE if the field has no value. Log In to reply. Public All Members My Connections Only Me PublicAll MembersMy ConnectionsOnly Me Public All Members My Connections Only Me