Understanding Incrementing

Question

For example this:

var a = 123;
var b = a++;

now a contains 124 and b contains 123

Answer 1

++ can be used as post-increment operator like in your example, or it could be used as a pre-increment operator if used before variable.

var b = ++a;

Then first the variable a will be incremented, then the incremented value is assigned to b.