Yeah, don't worry about people laughing. 'Tis all good
Ok, I'm not sure what exactly is what you need to do to get this bellcurve of flip coins. I mean, I know what a bellcurve is, but I'm not sure exactly what do you want to acomplish.
What I can suggest is, try to think of the logical steps to solve your problem *before* you program anything. That way you can see if you need for loops, while loops, etc.
What I mean is, for example: "I need to first write down the state of each of ten coins (write down if they are tails or heads), then, count each tails and each heads and add them toghether. Then divide them by PI and multiply by 2..."
Or whatever you need to do. Obviously mine was an absurd example.
If you put the problem this way, I can help you out on what exactly do you need. Specifically, here's an example of a nested for loop:
for(int i=1;i<=10;i++){
for(int j=1;j<=10;j++){
println("i * j = " + i*j);
}
}
This will print the multiplication table, i.e. 1x1=1...3x4=12...up to 10x10=100