ArrayFormula + simple if statement on Google Forms

Question

I am building a worksheet that takes form-submitted data and runs a few calculations. I am having trouble autopopulating cells with simple if statements. I am wondering about how to use ArrayFormula with a statement like:

=IF(J2<I2+1,1,0)

Or, even more complicated, an IF statement and a VLOOKUP:

=IF(H2+K2=2,VLOOKUP(F2,'Event Info'!A2:D7,4,False),"Message")

Thanks!

Answer 1

These formulae may work as you want. The LEN(A2:A) section checks your column A and will only output if there is a timestamp value from the Form :

=ArrayFormula(IF(LEN(A2:A),IF(J2:J<I2:I+1,1,0),))

=ArrayFormula(IF(LEN(A2:A),IF(H2:H+K2:K=2,VLOOKUP(F2:F,'Event Info'!A2:D7,4,0),"Message"),))