Global variable

#1

var myvar = ‘my value’;

(function() {
console.log(myvar);
var myvar = ‘local value’;
})();

why above is returning undefined? and not my value?

#2

See the variable hoisting section in MDN link https://developer.mozilla.org/en-US/docs/Web/JavaScript/Guide/Grammar_and_types#Variable_hoisting

#3

From the link,

    var myvar = 'my value';
 
    (function() {
      console.log(myvar); // undefined
      var myvar = 'local value';
    })();

is interpreted as:

var myvar = 'my value';
 
(function() {
  var myvar;
  console.log(myvar); // undefined
  myvar = 'local value';
})();
#4

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