Can anyone explain this ?!

Question

What is the output of this code?

var a="4";

var b=parseInt(a,10);

var c="8";

var d= parselnt(c, 10);

var e = document.write(b + d);

how come the result is 12??????

Answer 1

4+8 =12
the parseInt() function is converting its first parameter to int.
The second parameter (10) is the base. It means it is converted to decimal.