Use of @ in Stored Procedure

[Jesse]

I have skimmed through several pages of instructions on creating stored 
procedures, and I can't seem to find when I should and should not use the 
"@" symbol before a variable name?  I have seen a lot of procedures where 
it's always used, and I've written a procedure or two that doesn't use it at 
all, and it seems to work fine. What's the difference?

Thanks,
Jesse 


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