How to set formula for calculated column "age" based on "Date of Birth" column, with if condition in sharepoint lists?

Hi,

I want to create column for age,age should be a calculated column based onDate of Birth column. If date is not null the difference should be calculated else it should return 0.

I used the formula   IF(ISBLANK[Date of Birth],"0",DATEDIF([Date of Birth],Today,"Y")), but it is not working.

please help me,

Thank you.