How do I use "ISBLANK" in my equation?

[Anonymous]

Hi. 

I have created this extra "sort by column" and I would like to define the blanks in "Data[Løsnings_dage] as "0" and still has 0-1 defined as "1". How do I do that? I have tried to insert: 
IF(ISBLANK(Data[Løsnings_dage]), 0 , Data[Løsnings_dage])
0,
Data[Løsnings_dage]
)

at the beginning of the equation but it does not work 😞 

What am I doing wrong? 

Best regards,
Lisa 

[JorgePinho]

I will also suggest you to use SWITCH instead of so many nested IF's. It would look something like:

SWITCH(TRUE(),

ISBLANK(Data[Løsnings_dage]), "0",

Data[Løsnings_dage] <= 1, "1",

Data[Løsnings_dage] >= 2 &&  Data[Løsnings_dage] <= 5, "2",
....
)

[JorgePinho · Accepted solution]

You just have to put this in the beggining:

IF(
ISBLANK(Data[Løsnings_dage]),
"0" , 

... (the rest)