Assume the following JavaScript program was interpreted using static-scoping rules. What value of x is displayed in function sub1? Under dynamic-scoping rules, what value of x is displayed in function sub1? var x; function  sub1() {   document.write("x = " + x + ""); } function  sub2() {    var x;  x = 20;    sub1(); } x = 10; sub2();

Database System Concepts
7th Edition
ISBN:9780078022159
Author:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan
Publisher:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan
Chapter1: Introduction
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Assume the following JavaScript program was interpreted using static-scoping rules. What value of x is displayed in function sub1? Under dynamic-scoping rules, what value of x is displayed in function sub1?

var x;
function  sub1() {
  document.write("x = " + x + "");
}
function  sub2() {
   var x;
 x = 20;
   sub1();
}
x = 10;
sub2();

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