Functions

script.js

@@ -200,7 +200,7 @@ switch (true) {
 /*****************************
 * Truthy and Falsy values and equality operators
 */
-
+/*
 // falsy values: undefined, null, 0, '', NaN
 // truthy values: NOT falsy values
 var height;
@@ -214,4 +214,33 @@ if (height || height === 0) {
 if (height === '23') {
     console.log('The == operator does type coercion!');
 }
+*/
+
+
+
+/*****************************
+* Functions
+*/
+
+function calculateAge(birthYear) {
+    return 2018 - birthYear;
+}
+var ageJohn = calculateAge(1990);
+var ageMike = calculateAge(1948);
+var ageJane = calculateAge(1969);
+console.log(ageJohn, ageMike, ageJane);
+function yearsUntilRetirement(year, firstName) {
+    var age = calculateAge(year);
+    var retirement = 65 - age;
+    
+    if (retirement > 0) {
+        console.log(firstName + ' retires in ' + retirement + ' years.');
+    } else {
+        console.log(firstName + ' is already retired.')
+    }
+    
+}
+yearsUntilRetirement(1990, 'John');
+yearsUntilRetirement(1948, 'Mike');
+yearsUntilRetirement(1969, 'Jane');