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If you want to

Sets up a condition of the form 'if the goal is X, then Y is what it takes': if you want Al Pastor tacos, this is the place; you have to use seasoning if you want it tasty; Mum, you'll have to live a long time for us to get our money's worth. What follows it is almost always a requirement rather than a mere consequence. It is 려고 plus 'if', so the goal is always something someone intends.