How does the ISNUMBER function (DAX) work?

ISNUMBER function (DAX) checks whether a value is a number, and returns TRUE or FALSE.

ISNUMBER Formula Syntax

ISNUMBER (<value>)

How do you use the ISNUMBER function?

It returns TRUE when a cell contains a number, and FALSE if not. You can use ISNUMBER to check that a cell contains a numeric value, or that the result of another function is a number.

Considerations when using the ISNUMBER function

Usually, value is given as a cell address, but other functions and formulas can be wrapped within ISNUMBER to check the result.

ISNUMBER returns TRUE for dates and times since they are numerical, and FALSE for numbers entered as text.

Formula examples using the ISNUMBER function

//RETURNS: Is number  
=IF(ISNUMBER(0), "Is number", "Is Not number")  
  
//RETURNS: Is number  
=IF(ISNUMBER(3.1E-1),"Is number", "Is Not number")  
  
//RETURNS: Is Not number  
=IF(ISNUMBER("123"), "Is number", "Is Not number")