Question

This is what it says:

You can use an incrementer to make a number increase by one or a
decrementer to make it decrease by one. To increase the number, you
can use ++ after a variable.

Let’s make the variable i, in the editor, equal to 2 by incrementing
it twice. This should involve two separate lines with i++; on them.
Try it out now.

Here you can have two separate lines of iteration. Each should contain
just i++.

I have to modify this code:

var i = 0;
print( "i is equal to " + i );

I’m not sure if I’m too dumb, but I don’t know how to complete this tutorial.

Answer 1

The answer is trivially:

var i = 0;
i++;
i++;
print( "i is equal to " + i );

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Advanced details follow:

For what it’s worth, my preference would be to use the pre-incrementing ++i operator rather than post-incrementing i++.

The reason for this is that strictly speaking the latter evaluates to the original value of i as it was before it was incremented, i.e as if it was a function that does this:

var tmp = i;
++i;
return tmp;

This doesn’t really matter in Javascript, but if you progress to more advanced languages such as C++ it matters, because taking that additional copy of the object can be expensive.