Don't sweat it if you don't remember syntax stuff right away.
The building blocks will repeat so much - your if statements, loops, variable initialization - that some will stick in your head eventually.
But even when you get it, every once in a while you'll get a brain blip and have to look it up. Don't hesitate to have the language manual readily available. (As a next step, try working from that kind of language reference instead of copying direct from the tutorial.)
Most of the time in you won't even have to know it - in larger projects, you'll find a similar bit of code in an existing file and copy it, then make your modifications. Or depending on your dev environment, the IDE's intellisense stuff will act as a guide rail.