JS Daily 14 - Increment Operator

What is the output of following code?

var a = 10;
console.log(a++);
console.log(++a);

The output is:

10
12

Post increment operator first prints the value(10) and then increments a to 11. Pre increment first increments the value and then prints. So the 11 is first incremented to 12 and then printed to console.