completed all challenges

index.js

@@ -35,7 +35,8 @@ function addNumbers(num1, num2) {
  * the returned value should look like: 'Goodbye, Andy. Have a great day.'
  * 
 */
-function sayGoodbye(/* code here */) {
+function sayGoodbye(name) {
+  return `Goodbye, ${name}. Have a great day.`
   /* code here */
 }
 
@@ -53,7 +54,9 @@ function sayGoodbye(/* code here */) {
  * Hint 1: The formula for converting celsius to fahrenheit is t*9/5 + 32 where t is the temperature in celsius.
  * Hint 2: There is a very easy way to round numbers in JS. Do a google search to find out how. 
 */
-function temperatureCtoF(/* code here */) {
+function temperatureCtoF(cel) {
+ let  y = (cel* 9/5) +32;
+  return Math.round(y)
   /* code here */
 }
 
@@ -74,7 +77,14 @@ function temperatureCtoF(/* code here */) {
  * 
  * Hint: You can call your `temperatureCtoF` function from inside `temperatureInF`.
 */
-function temperatureInF(/* code here */) {
+function temperatureInF(tem,type) {
+
+  if (type === 'C'){
+   return temperatureCtoF(tem) + 'F'
+
+  }else{
+    return Math.round(tem) + type
+  }
   /* code here */
 }
 
@@ -95,7 +105,12 @@ function temperatureInF(/* code here */) {
  *   email: "leia@leia.com",
  * }
 */
-function makePersonObject(/* code here */) {
+function makePersonObject(id,name,email) {
+  let myobj = {}
+  myobj.id = id;
+  myobj.name = name;
+  myobj.email = email;
+  return myobj
   /* code here */
 }
 
@@ -112,7 +127,9 @@ function makePersonObject(/* code here */) {
  * passing { id: 1, name: 'Leia', email: 'leia@leia.com` } as the argument,
  * the returned value should look like `Hello, my name is Leia`.
 */
-function getName(/* code here */) {
+function getName(obj) {
+  let who = obj.name;
+  return `Hello, my name is ${who}`
   /* code here */
 }
 
@@ -132,7 +149,8 @@ function getName(/* code here */) {
  * passing in [ 'orange', 'grape', 'apple', 'banana', 'mango' ] as the argument,
  * the returned value should be: 2.
 */
-function appleIndex(/* code here */) {
+function appleIndex(arr) {
+  return arr.indexOf('apple')
   /* code here */
 }
 
@@ -151,7 +169,17 @@ function appleIndex(/* code here */) {
  * passing in [ 'orange', 'apple', 'banana', 'apples', 'apple', 'mango' ] as the argument,
  * the returned value should be: [ false, true, false, false, true, false ].
 */
-function isItAnApple(/* code here */) {
+function isItAnApple(arr) {
+  let arr2 = []
+  for(let i = 0; i < arr.length; i++){
+    if(arr[i] === 'apple'){
+      arr2.push(true)
+    }else{
+      arr2.push(false)
+    }
+
+  }
+  return arr2
   /* code here */
 }
 
@@ -210,6 +238,10 @@ function get3rdCar(inventory) {
  * it will return `This is a Lincoln Navigator`.
 */
 function getCarInfoByIndex(inventory, index) {
+  let make = inventory[index].car_make;
+  let model = inventory[index].car_model;
+
+  return `This is a ${make} ${model}`
   /* code here */
 }
 
@@ -224,7 +256,12 @@ function getCarInfoByIndex(inventory, index) {
  * For example, if getLastCarInfo is invoked passing the inventory inside /data/inventory.js,
  * it will return `This is a Lincoln Town Car`.
 */
-function getLastCarInfo(/* code here */) {
+function getLastCarInfo(arr) {
+ let make =  arr[arr.length - 1].car_make;
+ let model = arr[arr.length - 1].car_model;
+
+ return `This is a ${make} ${model}`
+
   /* code here */
 }
 
@@ -237,7 +274,14 @@ function getLastCarInfo(/* code here */) {
  *     (1) an array which is an inventory of cars like the one inside /data/inventory.js.
  * getModelYears returns an array containing all the 'car_year's in the inventory.
 */
-function getModelYears(/* code here */) {
+function getModelYears(arr) {
+  let years =[];
+  for(let i =0; i < arr.length; i++){
+    years.push(arr[i].car_year);
+
+  }
+
+  return years
   /* code here */
 }
 
@@ -255,7 +299,18 @@ function getModelYears(/* code here */) {
  * For example, if getCarInfoById is invoked with the inventory and the number 1,
  * it will return `This is a Lincoln Navigator`.
 */
-function getCarInfoById(/* code here */) {
+function getCarInfoById(arr,id) {
+  var make;
+  var model;
+
+  for(let i = 0; i <arr.length; i++){
+    if(arr[i].id === id){
+      make = arr[i].car_make;
+      model = arr[i].car_model;
+
+    }
+  }
+  return `This is ${make} ${model}`
   /* code here */
 }
 
@@ -273,7 +328,17 @@ function getCarInfoById(/* code here */) {
  * with a `car_year` which is at most the given desired max year,
  * in the same order as they appear in the original inventory.
 */
-function getOlderCars(/* code here */) {
+function getOlderCars(arr,maxYear) {
+  let arr2 =[]
+  for(let i = 0; i < arr.length; i++){
+    if(arr[i].car_year <= maxYear){
+      arr2.push(arr[i])
+
+
+    }
+  }
+  return arr2;
+
   /* code here */
 }
 
@@ -290,7 +355,21 @@ function getOlderCars(/* code here */) {
  * made by either `Audi` or `Mercedes-Benz` or `Volkswagen` or `BMW`,
  * in the same order as they appear in the original inventory.
 */
-function getGermanCars(/* code here */) {
+function getGermanCars(arr) {
+  let arr2 =[]
+  for(let i = 0; i < arr.length; i++){
+    if(
+      arr[i].car_make === 'Audi' ||
+       arr[i].car_make === "Mercedes-Benz" ||
+       arr[i].car_make === "Volkswagen" ||
+       arr[i].car_make === 'BMW'
+       ){
+      arr2.push(arr[i])
+
+
+    }
+  }
+  return arr2
   /* code here */
 }
 
@@ -307,7 +386,24 @@ function getGermanCars(/* code here */) {
  *         (1) causes the odometer in the object to be increased by the distance,
  *         (2) returns the updated value of the `odometer`.
 */
-function carMaker(/* code here */) {
+function carMaker(num) {
+  let myobj={
+    odometer:num,
+
+    drive: function(dist){
+      let y = this.odometer + dist;
+      myobj.odometer = y
+      return myobj.odometer
+
+
+    }
+
+
+  }
+  return myobj
+
+
+
   /* code here */
 }