Use of ‘&’ in sql

Question

Hi,

 

The below code prints A as output, but when doing vice-versa as @A=7 and @B=4 its not working.. kindly let me know what '&' operator does to validate

 

DECLARE @A int

DECLARE @B int

set @A=4

set @B=7

if @A&@B=@A

print 'A' 

 

Thanks

Sathish