Corrected existing code and added examples

Author: stephveile

explicit-and-implicit-conversion-in-javascript.js

@@ -19,14 +19,41 @@ Use console.log() to clearly show the before-and-after type conversions.
 */
 
 
-let result = "5" - 2;
-console.log("The result is: " + result);
-
-let isValid = Boolean("false");
+let numStr = "5"; // Add variable str to call out "5"
+console.log(typeof numStr);
+let num = Number(numStr); // Add variable num to convert "5" to number 5
+console.log(typeof num);
+let result = num - 2; // Use num to perform the math problem
+console.log("The result is: " + result); // This provides the same result but handles 5 as a number instead of a string
+
+let falseStr = "false"; // set a variable to equal the "false" string
+console.log(typeof falseStr);
+falseStr = (falseStr === false); // Set the falseStr to a Boolean stating if "false" equals false
+console.log(typeof falseStr);
+let isValid = Boolean(falseStr);
 if (isValid) {
     console.log("This is valid!");
-}
+} // The code no longer outputs because the Boolean is actaully false rather than "false" (which is truthy)
 
-let age = "25";
-let totalAge = age + 5;
+let ageInput = "25"; // Call out ageInput as a string
+console.log(typeof ageInput);
+let ageNum = Number(ageInput); // Change ageInput to number
+console.log(typeof ageNum);
+let totalAge = ageNum + 5; // Use ageNum in the math problem
 console.log("Total Age: " + totalAge);
+
+// Implicit Conversion Example
+let testScore = 82; // Score is entered as a number
+console.log(typeof testScore);
+let grade = ("Your grade is " + testScore + "/100"); // Score is converted to string
+console.log(typeof grade);
+console.log(grade); // Grade is shown as a whole string
+
+// Explicit Conversion Example
+let extraCreditInput = 0; // Extra credit is entered as a number
+console.log(typeof extraCreditInput);
+let extraCreditBool = Boolean(extraCreditInput); // Extra credit is converted to a Boolean
+console.log(typeof extraCreditBool);
+if (!extraCreditBool) {
+  console.log("You did not earn any extra credit.");
+}