exec: explain-the-difference-between-global-scope-function-scope-and-block-scope

Author: tahachm

questions/explain-the-difference-between-global-scope-function-scope-and-block-scope/en-US.mdx

@@ -6,7 +6,7 @@ title: Explain the difference between global scope, function scope, and block sc
 
 Global scope means variables are accessible from anywhere in the code. Function scope means variables are accessible only within the function they are declared in. Block scope means variables are accessible only within the block (e.g., within `{}`) they are declared in.
 
-```js
+```js live
 var globalVar = "I'm global"; // Global scope
 
 function myFunction() {
@@ -18,6 +18,7 @@ function myFunction() {
   // console.log(blockVar); // Uncaught ReferenceError: blockVar is not defined
 }
 // console.log(functionVar); // Uncaught ReferenceError: functionVar is not defined
+myFunction();
 ```
 
 ---
@@ -28,7 +29,7 @@ function myFunction() {
 
 Variables declared in the global scope are accessible from anywhere in the code. In a browser environment, these variables become properties of the `window` object.
 
-```js
+```js live
 var globalVar = "I'm global";
 
 function checkGlobal() {
@@ -43,21 +44,21 @@ console.log(globalVar); // Output: "I'm global"
 
 Variables declared within a function are only accessible within that function. This is true for variables declared using `var`, `let`, or `const`.
 
-```js
+```js live
 function myFunction() {
   var functionVar = "I'm in a function";
   console.log(functionVar); // Accessible here
 }
 
 myFunction(); // Output: "I'm in a function"
-// console.log(functionVar); // Uncaught ReferenceError: functionVar is not defined
+console.log(functionVar); // Uncaught ReferenceError: functionVar is not defined
 ```
 
 ### Block scope
 
 Variables declared with `let` or `const` within a block (e.g., within `{}`) are only accessible within that block. This is not true for `var`, which is function-scoped.
 
-```js
+```js live
 if (true) {
   let blockVar = "I'm in a block";
   console.log(blockVar); // Accessible here