Day 27: Hoising, Scoping

javascript/Day27/index.js

@@ -0,0 +1,78 @@
+let k = 2;
+
+function abc() {
+  let p = 3;
+  k = 4;
+  if (p < k) {
+    let h = 5;
+    console.log(h, p, k);
+  }
+  console.log(h);
+}
+console.log(k);
+abc();
+
+/*
+  var variables are functional scope variables
+  let variables are block scoper variables.
+*/
+
+console.log(hoist);
+var hoist = "value";
+
+myFunction();
+let p = 3;
+function myFunction() {
+  console.log("hello", p);
+}
+
+myFunction();
+
+var myFunction = function () {
+  console.log("hello");
+};
+
+let a = 3;
+let b = new Number(3);
+let c = 3;
+
+console.log(a == b);
+console.log(a === b);
+console.log(b === c);
+
+a();
+
+b();
+
+function a() {
+  console.log("Hello");
+}
+var x = function () {
+  console.log("Bye");
+};
+
+var a = 4;
+
+var g = 6;
+
+console.log(a, g);
+
+/* write your logic to swap values of two variables */
+
+console.log(a, g); //6,4
+
+var a = 4;
+var j = 6;
+
+console.log(a, j);
+c = a;
+a = j;
+j = c;
+console.log(a, j);
+
+/* write your logic to swap values of two variables without using third variable */
+
+a = a + b;
+b = a - b;
+a = a - b;
+console.log(a, b);