Complete stretch explore notes for Chrome console and objects

Author: salahalsabhi

Sprint-2/4-stretch-explore/chrome.md

@@ -13,3 +13,7 @@ Now try invoking the function `prompt` with a string input of `"What is your nam
 
 What effect does calling the `prompt` function have?
 What is the return value of `prompt`?
+## Answers
+- alert("Hello world!") shows a browser alert dialog with that message.
+- prompt("What is your name?") shows an input dialog asking for a name.
+- prompt returns the typed string if OK is pressed, or null if Cancel is pressed.

Sprint-2/4-stretch-explore/objects.md

@@ -14,3 +14,9 @@ Answer the following questions:
 
 What does `console` store?
 What does the syntax `console.log` or `console.assert` mean? In particular, what does the `.` mean?
+## Answers
+- console.log is a function (native code).
+- console is an object containing logging methods.
+- typeof console is "object".
+- console stores the browser/devtools console API object.
+- The dot `.` means property access: console.log is the log property (a function) on the console object.