Help with matching formula

[Guest]

Hi

Can anyone help me how to write a matching formula please...
I'd like to match Column B from Colum A, then place number 1 if match found.

Also note: I have handred to items to match in Column A and Column B


Thank you in advance
Soth


Col. Col. Col.
A B C

Jon Peter
Jane Michelle
Joe Jon 1
Michael
Jason
Joe 1
Wang
Jashua
Jane 1

 

[Guest]

=IF(COUNTIF($A$1:$A$100,B1)>0,1,"")

Change range of A as required

HTH

 

[Aladin Akyurek]

=ISNUMBER(MATCH(A2,B:B,0))+0