beaadelrosario · beaadelrosario · Jun 9, 2020 · Jun 9, 2020 · Jun 9, 2020 · Jun 10, 2020
diff --git a/.vscode/settings.json b/.vscode/settings.json
@@ -0,0 +1,3 @@
+{
+    "liveServer.settings.port": 5501
+}
diff --git a/index.js b/index.js
@@ -4,9 +4,10 @@
 /* Create variables for principal, interest rate, and years. Assign them the values 200000, 0.05, and 30 respectively. Create another value called name and give it the value of your own name.
 */
 
-
-
-
+let principal = 200000; /*principal*/
+let interestRate = 0.05; /*interest rate*/
+let years = 30; /*years/periods*/
+const name = "Bea";
 
 // 🏡 Task 1.5: Simple Math
 /* To create a monthly mortgage rate calculator, we need to know the number of years in months and the monthly interest rate. 
@@ -15,7 +16,8 @@
 (2) Create another variable called `periods` and give it the value of years*12.
 */
 
-
+const monthlyInterestRate = interestRate/12; /* using const so nothing can accidently mess it up - this one specifially higher order function so nothing else can override it*/
+const periods = years*12; /* this is years times 12 months*/
 
 
 // 🏡 Task 2: Harder Math
@@ -27,16 +29,24 @@ Hint: while these calculations can be done in one line, it might be helpful to c
 
 (1) Create a variable called n1 and set it equal to  (1 + I )^N
 (2) Create a variable called n2 and set it equal to n1 * I
-(3) Create a variable called numerator and set it equal to n1 * n2 
+DOESNT WORK - (3) Create a variable called numerator and set it equal to n1 * n2 
 (4) Create a variable called denominator and set it equal to n1 - 1 
 (5) Create a variable called monthlyRate and set it equal to numerator/denominator
 
 Hint #2: you'll need to use the `math` object for parts of this calculation!
 
 When your math is correct, monthlyRate will equal 1073.64
-*/
 
+var monthlyRate = principal * ((monthlyInterestRate * Math.pow((1  + monthlyInterestRate), periods)) / (Math.pow((1  + monthlyInterestRate), periods) - 1));
+var monthlyRate = Math.round(monthlyRate * 100)/ 100;
+console.log(monthlyRate)
+*/
 
+let n1 = Math.pow((1 + monthlyInterestRate), periods);
+let n2 = n1 * monthlyInterestRate;
+let denominator = n1 - 1;
+let monthlyRate = principal*(n2/denominator);
+    console.log (monthlyRate)
 
 
 // 🏡 Task 3: Function
@@ -45,8 +55,10 @@ When your math is correct, monthlyRate will equal 1073.64
 If your name is `Oscar` mortgageCalculator() should return "Oscar, your monthly rate is 1073.64"
 */
 
-
-
+function mortgageCalculator() {
+    return (`${name}, your monthly rate is ${monthlyRate}`)
+}
+    console.log (mortgageCalculator());
 
 
 // 🏡 Task 4: Arguments and Parameters
@@ -56,20 +68,29 @@ For example,
 mortgageCalculator(200000, 0.05, 30); <-- should return 1,073.64
 */
 
-
-
-
+function mortgageCalculator (P, I, N) {
+    let rate = (P * ((I / 12) * Math.pow(1 + (I / 12), (N * 12))) / (Math.pow(1 + (I / 12), (N * 12)) - 1))
+    return rate;
+}
+console.log(mortgageCalculator(200000, 0.05, 30));
 
 // 🏡 Task 5: Conditionals
-/* Add another paramter to your function called credit score. This parameter will be a number between 0 and 800 (a credit score).
+/* Add another parameter to your function called credit score. This parameter will be a number between 0 and 800 (a credit score).
 
 Then, add control flow within your function such that IF creditScore is above 740, interest rate drops by 0.5%, if credit score is below 660, interest rate increases by 0.5% and if credit score is anywhere between 660 and 740 interest rate doesn't change.
 
 Hint: To drop an interest rate by 5% you can take monthlyRate and multiply it by 0.95. Similarly, to increase an interest rate by 5% you'd do monthlyRate * 1.05. 
 */
 
-
-
+function adjustedRate (P, I, N, creditScore) {
+    if (creditScore > 740) {
+         I = I - 0.005;
+    } else if (creditScore < 660) {
+         I = I + 0.005;
+    }
+    return mortgageCalculator (P, I, N);
+}
+console.log (adjustedRate(200000, 0.05, 30, 665))
 
 // 🏡 Task 6: Loops
 /* Write a new function called variableInterestRate. This function should be the same as mortgageCalculator, except it should console.log the monthly payment for 10 different interest rates at 0.5% increments plus or minus 2% from the inputted interest rate. Complete these calculations using a for loop.
@@ -87,7 +108,15 @@ For example, variableInterestRate(200000, 0.04, 30) should console.log:
 "{Name}, with an interest rate of 0.06, your monthly rate is $1199"
 */
 
-
+function variableInterestRate(P, I, N) {
+    I -= 0.02;
+    for(let i = 0; i < 9; i ++){
+        let monthlyRate = Math.round(P * (((I/12) * Math.pow((1 + (I/12)), (N * 12))) / (Math.pow((1 + (I/12)), (N * 12)) - 1)) *100)/100
+        console.log(`${name}, with an interest rate of ${I.toFixed(3)}, your monthly rate is $${monthlyRate}`)
+        I+= 0.005
+    };
+}
+variableInterestRate(200000, 0.04, 30)
 
 
 // 🌟🌟🌟 STRETCH 🌟🌟🌟//
@@ -99,8 +128,23 @@ For example, variableInterestRate(200000, 0.04, 30) should console.log:
 
 /* 🏡 Build a calculator function that accepts `monthly payment` and `interest rate` and returns the maximum loan that a person could afford */
 
+function maxLoan (payment, I) {
+    return maxLoan (300,0.05);
+    }
 
-/* 🏡 Explore using `window.prompt()` to allow a user to input parameters in the browser */
 
+/* 🏡 Explore using `window.prompt()` to allow a user to input parameters in the browser */
+var user = prompt("Hello!", "What is your name?");
 
 /* 🏡  Refactor your `variableInterestRate()` function to accept an array of interest rates (make sure to copy and paste as to not lose your work!) */
+
+/*const interestRates =  [0.02, 0.025, 0.03, 0.035, 0.4, 0.45, 0.5, 0.55]
+function variableInterestRate(P, [], N) {
+    I -= 0.02;
+    for(let i = 0; i < 9; i ++){
+        let monthlyRate = Math.round(P * (((I/12) * Math.pow((1 + (I/12)), (N * 12))) / (Math.pow((1 + (I/12)), (N * 12)) - 1)) *100)/100
+        console.log(`${name}, with an interest rate of ${I.toFixed(3)}, your monthly rate is $${monthlyRate}`)
+        I+= 0.005
+    };
+}
+interestRates ();*/