Completed the tasks and answered the questions

Author: ashaahmed7

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

@@ -11,8 +11,12 @@ In the Chrome console,
 invoke the function `alert` with an input string of `"Hello world!"`;
 
 What effect does calling the `alert` function have?
+It shows a message in a pop up box and stops the page until the user clicks "OK".
 
 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?
+Shows a pop up box with a message "What is your name?" and an input box.
+
 What is the return value of `prompt`?
+Prompt() returns the text the user enters, or null if they cancel the dialog.