Answered question about invoking Alert for chrome.md file

Author: Tobias-Amaechina

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

@@ -10,7 +10,9 @@ Let's try an example.
 In the Chrome console,
 invoke the function `alert` with an input string of `"Hello world!"`;
 
+
 What effect does calling the `alert` function have?
+// By invoking  alert("Hello world!"); the effect it has is that a small modal dialog box pops up at the top of  the window browser displaying Hello world!, along with an OK button.
 
 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`.