steveast · December 26, 2018 08:44
diff --git a/Собеседование: use strict b/Собеседование: use strict
 'use strict'

 x = 5; // error! next examples with let x

 console.log(++x); // 6
 console.log(x++); // 6

 function foo() {
  console.log(x); // undefined, because there is x below
  x += 5;
  console.log(x); // NaN

  var x = 2;
  console.log(x); // 2
 }

 foo();
 console.log(x); // 7
	'use strict'

	x = 5; // error! next examples with let x

	console.log(++x); // 6
	console.log(x++); // 6

	function foo() {
	console.log(x); // undefined, because there is x below
	x += 5;
	console.log(x); // NaN

	var x = 2;
	console.log(x); // 2
	}

	foo();
	console.log(x); // 7