Add DataType-Summary

Author: ankitsingh015

01_Basic/dataype-summary.js

@@ -0,0 +1,51 @@
+// how we store data and access data
+// On basis of it we catgories datatype into 2 parts
+// 1.Primitive Data Type        2.Non primitive DataType
+
+
+
+    // #Primitive Data Type
+    // 7 type : String, Number , Boolean, null, undefined, symbol,Bigint
+
+const score = 100
+const scoreValue=100.3
+
+const isLoggedIn =false
+const outsideTemp= null
+let userEmail
+
+const id =Symbol('123')
+const anotherId=Symbol('123')
+
+console.log(id);
+console.log(anotherId);
+console.log(id == anotherId);
+
+const bigNumber = 3411541515151994n
+
+    // #Refernece type or Non-primitive DataType
+    // - Array
+    // - objects
+    // - Functions
+
+    const heros= ["hanuman","shri ram","shiv ji"]
+
+    let myobj=   {
+        name: "hitesh",
+        age: 22,
+    }
+
+    const myfunction = function(){
+        console.log("Hello World")
+    }
+
+
+console.log(typeof myobj)
+
+
+
+//Dynmaic or Static Type Language ?
+
+// =>JavaScript is a dynamic language and not static, 
+//which means that variables can hold values of different types during runtime.
+//Unlike languages such as Typescript or Java, you don’t need to declare the data type of a variable explicitly.