Using a parameter inside the definition of another parameter

I am trying to use another ms  sql parameter as the value in the following:

declare @checkpoint varchar(30)='39.3921 -75.1262';
declare @point geometry;
set @point= geometry::STGeomFromText(''point(''+@checkpoint+'')'',0);
select @g1.STIntersects(@point);

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I am lost as to where to put the single quotes. Thanks
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WillOwnerAsked:
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WillOwnerAuthor Commented:
Ok I got it to work,  I was over thinking the single quotes

declare @p varchar(30)='39.3921 -75.1262'
declare @checkpoint varchar(30)='point('+@p+')';
declare @point2 geometry;
declare @point geometry;
set @point2= geometry::STGeomFromText(@checkpoint,0);
set @point= geometry::STGeomFromText('point(39.3921 -75.1262)',0);

select @g1.STContains(@point);
select @g1.STContains(@point2);

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Thanks anyway
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Mark WillsTopic AdvisorCommented:
Yeah, easy to do. Just remember a single quote INSIDE a single quoted string needs to be doubled up. Otherwise, it is simply single quotes all the way - and usually the better way to start - using single quotes...

And, if getting tricky, simply PRINT your declarative :)
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