Answered question on the effect of prompt function in chrome.md file

Author: Tobias-Amaechina

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

@@ -17,4 +17,6 @@ What effect does calling the `alert` function have?
 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?
+//The effect is similar to the alert one a small modal dialog box pops up  with the addition of a text input field and two buttons for 'OK' and 'Cancel', it displays the question What is your name?
 What is the return value of `prompt`?
+//The return value of the 'prompt' depends on what action the client did , whci is one of two things based on the client actions.it will return whatever the client typed into the text field as string and click 'OK' and this will be stored in the variable myName, and can be verified by typing myName into the console and hitting ENTER.However if the user clicks cancel , it returns null.