interview imp- closure&lexicalscopes

Author: saiprasadm45

Resource & interviews/closure&lexical_scope.js

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+//lexical scoping => a parent/outer function defined property has access to every fun defined and executed inside that parent/outer fun.
+//lexical scoping => inner fun has access to outer fun's properties.
+function outer(){
+    let myname = 'suraj';
+    function inner(){
+        console.log("from inner1 ", myname)
+        function inside_inner(){
+            console.log('from inside_inner of inner1', myname)
+        }
+        inside_inner()
+    }
+    let myfun =  ()=>{
+        console.log("from myfun arrow ->", myname)
+    }
+    inner()
+    myfun()
+}
+outer()
+
+
+//closure => a function along with its lexical scope is called closure.
+
+function outer2(){
+    let username = 'piyush';
+    function inner2(){
+        console.log("from inner2 ", username)
+    }
+    return inner2
+}
+let ans = outer2() //ans is a function which has access to its lexical scope.
+ans() //calling the inner2 function which has access to its lexical scope.