Add Basic of JavaScript

Author: ankitsingh015

01_Basic/04_Comparison.js

@@ -5,5 +5,21 @@
 // console.log(2!=1);
 
 
-console.log("2" > 1);
-console.log("02" > 1);
+// console.log("2" > 1);
+// console.log("02" > 1);
+
+// console.log(null >0)        //false 
+// console.log(null == 0)      //false
+// console.log(null >= 0)      //true
+
+// The reason is that an equality check == and comparisons > < >= <= work differently.
+// Comparions convert null to a number, treating it as 0
+// That's why (3) null >=0 is true and (1) null >0 is false.
+
+console.log(undefined ==0)      //flase
+console.log(undefined >0)       //false
+console.log(undefined <0)       //false
+
+// ===  =>strict check
+
+console.log("2" === 2)