Quick question about a switch statement

After reading the lesson about switch statements I am confused so I set up 2 examples here. In example one if i start it with switch (x) and then have case 1, does that mean if x==1 then it will cout "x is 1" or what? And if not, would my second example work? thanks. And i dont get it what is supposed to be inside switch(inside here). Is it supposed to be the variable or just whatever you want to call the switch??

example 1
switch (x)
case 1:
cout<<"x is 1";

example 2
case (x==1):
cout<<"x is 1";
pls helps
Check out the tutorial section in C++ which talks about switch statements:
i did but i just dont understand t hat one thang
help pls
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