How does the BLANK function (DAX) work?

The BLANK function (DAX) returns a blank and it is an expression that has no parameters.

BLANK Formula Syntax

BLANK(
)

How do you use the BLANK function?

A BLANK is different from a NULL. In DAX, you may use a BLANK for both database nulls and for blank cells in Excel. Blanks and empty strings (“”) are not always equivalent, but some operations may treat them as such. 

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Considerations when using the BLANK function

When you evaluate a DAX expression, a BLANK is converted to 0 or an empty string, depending on the data type requested by the said expression.  

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Formula examples using the BLANK function

=IF( SUM(InternetSales_USD[SalesAmount_USD])= 0

BLANK () = 0

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