a commit

Author: bendand

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

@@ -18,15 +18,54 @@ Use console.log() to clearly show the before-and-after type conversions.
 
 */
 
-
-let result = "5" - 2;
+// broke down the variable subtraction into more steps, making the code
+// easier to follow. can convert x value with Number(), though the interpreter 
+// makes the decision to convert data type automatically to a number
+let x = "5";
+let y = 2;
+let result = x - y;
 console.log("The result is: " + result);
 
-let isValid = Boolean("false");
+// Boolean() wrapper was unnecessary and caused confusion, because it wrapped a non-empty string 
+// which evaluated the code to boolean true. so I just initialized the false value as a bool
+let isValid = false;
 if (isValid) {
     console.log("This is valid!");
 }
 
+// converting age to a primitive Number makes the addition work fine
 let age = "25";
-let totalAge = age + 5;
+let totalAge = Number(age) + 5;
 console.log("Total Age: " + totalAge);
+
+
+// MY EXAMPLES
+
+// EXPLICIT CONVERSION
+let someInput = '5';
+let anotherInput = null;
+
+let sumInputs;
+
+if (someInput === null && anotherInput == null) {
+  sumInputs = 0;
+} else if (someInput === null) {
+  sumInputs = Number(anotherInput);
+} else if (anotherInput === null) {
+  sumInputs = Number(someInput);
+} else {
+  sumInputs = Number(someInput) + Number(anotherInput);
+}
+
+console.log(sumInputs);
+
+
+// IMPLICIT CONVERSION
+
+let numX = 3;
+let numY = '8';
+let product = numX * numY;
+
+console.log(product);
+
+