docs: update README with prompt return values and console logs

Author: Grajales-K

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

@@ -29,10 +29,10 @@ 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`.
 
 
-    let myName = prompt("hello what is your name")
-    alert("hi " + myName)
+    let myName = prompt("What is your name");
+    alert("hi " + myName);
 
-    The prompt function displays a modal dialog that captures user input. The value entered is stored in myName, and alert then displays a greeting that includes that value.
+    The prompt function displays a modal dialog that captures user input. The value entered is stored in myName, and alert then displays a greeting that includes that value input captured by the variable myName.
 
 
 What effect does calling the `prompt` function have?
@@ -48,3 +48,48 @@ What is the return value of `prompt`?
 
     * Blocks interaction with the page until the user responds
 
+    If the user types something and clicks OK: It returns a String containing their text.
+
+If the user clicks OK without typing: It returns an empty string ("").
+
+If the user clicks Cancel or hits Esc: It returns null.
+
+
+
+
+# --- Browser Console Simulation ---
+
+> alert("hi " + myName);
+
+< undefined
+
+> let myName = prompt("What is your name")
+
+< undefined
+
+> console.log(myName)
+
+< null          // User clicked Cancel
+
+> let myName = prompt("What is your name")
+> console.log(myName)
+
+< "Kyle"          // User typed a name
+
+> let myName = prompt("What is your name")
+> console.log(myName)
+
+< ""            // User clicked OK without typing
+
+> console.log(typeof(myName))
+
+< "string"
+
+> console.log("Longitud:", myName.length);
+
+< Longitud: 0
+
+
+
+
+