How to write an IF Statement to look for NOT null

Question

In our app we converted 400 projects that had historical SPONSORS as a text field.&nbsp;

Approximately half of the projects are closed so we plan to keep a Sponsor-Historical (text field) for closed projects.
Approximately half of the projects are active so for these we will invite the Sponsors to become QuickBase users.&nbsp; &nbsp;As they become users we will assign the project to a Sponsor-User (user) field.&nbsp; &nbsp;Some Sponsors choose to not become users the project needs to retain the Sponsor-Historical (text) field.
In our project header we want to display the Sponsor Name cleanly with a formula text field that chooses the UserToName version of the Sponsor-User field if it exists, otherwise&nbsp; choose the Sponsor-Historical field if it exists, otherwise display a null value for the displayed version.&nbsp; &nbsp;

Note: We were struggling with the If Statement so we chose to create a separate formula text called SPONSOR-UserToName field to confirm that the UserToName conversion was working properly, which it is.
PROBLEM: We continue to struggle with the conditional statement to do the following:

If Sponsor UsertoName field exists, use it in the display value field otherwise
If Sponsor Historical field exists, use it in the display value field otherwise
Display Value field is null&nbsp;

What we have so far works only if the first line is true, always ignores the 2nd line and if the first line is not true produces a null value.
If(IsNull([Sponsor-vUserToName])=false,[Sponsor-vUserToName],
If(IsNull([Sponsor-Historical])=false,[Sponsor-Historical],
null))
Of interest if we swap the 1st and 2nd lines, which ever line is 1st works if not null, but 2nd line never fires.&nbsp; &nbsp;How can we resolve this If statement?&nbsp;&nbsp;Thanks in advance for your help.

------------------------------Annetta Coleman------------------------------

annettacoleman · Answer

Well Duh....&nbsp; &nbsp;It works just fine if I use &lt;&gt; Null instead of IsNull = False.&nbsp; &nbsp; Amazing what clarity can be discovered via a Power Nap.&nbsp; Sorry to waste community time.------------------------------Annetta Coleman------------------------------

markshnier__you · Answer

I just a tip. You can't use IsNull to test for a Text field type being blank. I use this

IF(Trim([My Text field]) = "", ............)

------------------------------
Mark Shnier (YQC)
mark.shnier@gmail.com
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miketamoush · Answer

To add on to Mark's tip:If you ARE testing a numerical field simply use:isnull([Field]) to test if blanknot isnull([Field]) to test if not blank (versus isnull &lt;&gt;null....)------------------------------Mike Tamoush------------------------------

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How to write an IF Statement to look for NOT null