Issue with DATEADD function in DAX

Question

I am creating a formula with and cannot able to understand what is DATEADD function which results to the error given below

DATEADD(FIRSTNONBLANK(DATATABLE("TodaysDate",DATETIME,{{"9/24/2016"}}),TRUE()),4,MONTH)

Can anyone help me to understand Dateadd function? 

Answer 1

Create a calculated column and add this

4MonthsAfter = DATEADD(MyDates[Date],4,MONTH)

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