You can make 2 seperate variables: 1 with a vector with the x, y and z coordinate of the location. Another variable with the world, but as a string. Then you can use the location at expression to get the location whenever you need it

 

Code (Text):

1. command /setpos [<integer>]:
2.     trigger:
3.         if arg 1 is 1:
4.             set {pos1} to location of player
5.             stop
6.         if arg 1 is 2:
7.             set {pos2} to location of player
8.             stop
9.  
10. command /tppos [<integer>]:
11.     trigger:
12.         if arg 1 is 1:
13.             teleport player to {pos1}
14.             stop
15.         if arg 1 is 2:
16.             teleport player to {pos2}
17.             stop