completed tasks in Sprint-1/4-stretch-explore/chrome.md

Author: i786m

Sprint-1/4-stretch-explore/chrome.md

@@ -12,7 +12,14 @@ invoke the function `alert` with an input string of `"Hello world!"`;
 
 What effect does calling the `alert` function have?
 
+It creates an alert dialog box with a message of whatever is passed into the alert function call
+
 Now try invoking the function `prompt` with a string input of `"What is your name?"` - store the return value of your call to `prompt` in an variable called `myName`.
 
 What effect does calling the `prompt` function have?
+
+It creates a dialog box with a message of what is passed to the prompt function and an input field
+
 What is the return value of `prompt`?
+
+This is the response typed into the input field in the prompt dialog window or null if cancel is selected