update for try-catch-finally

Author: faran4engg

challenges/primitives.md

@@ -198,7 +198,7 @@ num1 > 0 || num2 < 0      // true
 const num1 = 10, num2 = 20;
 
 true && false;                // false
-false && false;               // true
+false && false;               // false
 true && num1;                 // 10
 num1 && num2;                 // 20
 "text" && (num1 + num2)       // 30
@@ -815,21 +815,22 @@ myTag`Note: ${person} is a member of following communities: ${membership}`;
 ### Write a code to show the working of `try...catch...finally`
 
 - The `try` statement consists of a try-block, which contains one or more statements. At least one catch-block, or a finally-block, must be present
-- The exceptions and errors in from try block are caught in catch block
+- The exceptions and errors from try block are caught in catch block
 
 ```js
 try {
-    // statements
-    throw new Error("Unexpected error");
+	  callAPI(); // It will throw an Error
 } catch (error) {
-    // statements
+	  throw new Error(error); // ReferenceError: callAPI is not defined
 } finally {
-    // statements
+	  console.log("I will execute no matter what happened in try or catch");
 }
 ```
 
 ###### Notes
-`try` can be chained with `catch` block or `finally` block
+
+- `try` can be chained with `catch` block or `finally` block
+- `try..catch` only works synchronously and for runtime errors
 
 ###### References
 - https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Statements/try...catch