Need explanation on this javascript code challenge.

Question

function foo(a) {
var b = 5;
function bar(a) {
return b + a;
}
return bar(b++);
}
console.log(foo(8)); // Answer 11

No matter what parameter value I call foo it still came out 11.

Answer 1

foo calls bar

Check chat room

Answer 2

Apongpoh Gilbert welcome bro

Answer 3

Saw it bro thanks