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Increment

In programming, you often want to increase or decrease a counter by one. This can easily be done with the increment or decrement operator.
var x = 1;
x++;
var y = 10;
y--;
x++ is the same as x = x + 1 and y-- is the same as y = y - 1. After executing the example code, x has the value 2 and y has the value 9.

Exercise

Which value does x have after execution of the following code?
var x = 3;
x++;
x = x * 2;
x--;
7