Pmiller1208 · Pmiller1208 · May 13, 2020 · May 14, 2020
diff --git a/index.js b/index.js
@@ -3,7 +3,11 @@
 // 🏡 Task 1: Variables
 /* 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 principle = 200000;
+let instRate = .05;
+let years = 30;
+const name = "Patrick Miller"
+
 
 
 
@@ -15,7 +19,9 @@ Create a variable called `monthlyInterestRate` and give it the value of interest
 
 Create another variable called `periods` and give it the value of years*12.
 */
-
+const monthlyInterestRate = instRate/12;
+const periods = years*12
+// console.log(periods);
 
 
 
@@ -28,7 +34,19 @@ 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
 */
+const exponent = Math.pow((1 + monthlyInterestRate), periods)
+const numerator = monthlyInterestRate * exponent;
+const denominator = exponent - 1;
+// const monthlyRate = principle * (numerator / denominator);
+// console.log(monthlyRate)
+
+// function monthlyRate(){
+//     let result = (principle * (numerator/denominator)).toFixed(2);
+//     return result;
+// }
 
+// console.log(monthlyRate());
+// console.log(100.12345.toFixed(4));
 
 
 
@@ -37,7 +55,17 @@ 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(){
+//     const exponent = Math.pow((1 + monthlyInterestRate), periods);
+//     const numerator = monthlyInterestRate * exponent;
+//     const denominator = exponent - 1;
+//     function monthlyRate(){
+//         let result = (principle * (numerator/denominator)).toFixed(2);
+//         return result;
+//     }
+//     return name + " your monthly rate is $" + monthlyRate();
+// }
+// console.log(mortgageCalculator());
 
 
 
@@ -49,6 +77,25 @@ For example,
 mortgageCalculator(200000, 0.05, 30); <-- should return 1,073.64
 */
 
+// function add(num1, num2){
+//     return num1 + num2;
+// }
+// add(3,3);
+
+// function mortgageCalculator(p, i, n){
+//     let principle = p;
+//     let instRate = i;
+//     let periods = n*12;
+//     const exponent = Math.pow((1 + monthlyInterestRate), periods);
+//     const numerator = monthlyInterestRate * exponent;
+//     const denominator = exponent - 1;
+//     function monthlyRate(){
+//     return principle * (numerator/denominator);
+//     }
+//     return name + " your monthly rate is $" + (monthlyRate().toFixed(2));
+// }
+// console.log(mortgageCalculator(200000, 0.5, 30));
+
 
 
 
@@ -58,6 +105,80 @@ mortgageCalculator(200000, 0.05, 30); <-- should return 1,073.64
 
 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.
 */
+// function mortgageCalculator(p, i, n, credit){
+
+//     function creditCalc(credit){
+//         if(credit > 740){
+//             let discount = i * .50;
+//             let newRate = i - discount;
+//             return newRate;
+//         } else if (credit < 660){
+//             let increase = i * .50;
+//             let increaseNewRate = i + increase;
+//             return increaseNewRate;
+//         } else if (credit <= 740 && credit >= 660){
+//             return instRate
+//         }
+//     }
+//  console.log(creditCalc(credit))
+
+//     let principle = p;
+//     let instRate = creditCalc(credit) / 12;
+//     let periods = n*12;
+
+//     const exponent = Math.pow((1 + monthlyInterestRate), periods);
+//     const numerator = monthlyInterestRate * exponent;
+//     const denominator = exponent - 1;
+//     function monthlyRate(){
+//     return principle * (numerator/denominator);
+//     }
+//     function monthlyRate(){
+//     let result = (principle * (numerator/denominator)).toFixed(2);
+//     return result;
+//     }
+
+// }
+
+// console.log(mortgageCalculator(200000, 0.5, 30, 780));
+
+function mortgageCalculator(name, principal, interestRate, years, creditScore){
+    // part 0) Credit Score discount 
+
+    function creditCalc(creditScore){
+        if (creditScore > 740 ){
+            let discount = interestRate * .50;
+            console.log(`I am the discount ${discount}`)
+            let discountedIRate = interestRate - discount
+            console.log(`I am the decreased intrest rate of: ${discountedIRate}`) 
+            return discountedIRate; 
+            // interest rate - 50%
+        } else if (creditScore < 660){
+            let increase = intrestRate * .50;
+            let increasedIRate = interestRate + increase
+            console.log(`I am the increased intrest rate of: ${increasedIRate}`) 
+            return increasedIRate;
+            // 660, interest rate increases by 0.5%
+        } else if (creditScore >=660 && creditScore <=740 ) {
+            return interestRate; 
+            // Credit of between 660 and 740 mantains the same interest rate 
+        }
+    }
+console.log(creditCalc(creditScore))
+
+
+    // part 1) Get I and N
+    var I = creditCalc(creditScore) / 12;
+    console.log(`I am the monthly intrest rate: ${I}`)
+    var N = years * 12;
+    // part 2) 
+    var numerator =  I*(1+I)**N;;
+    var denominator = (1+I)**N-1;
+    var mrPreRounded = principal * (numerator/denominator);
+    var monthlyRate =  mrPreRounded.toFixed(2)
+    // part 3) Return string greeting with Monthly Rate
+    return `${name}, your monthly rate is $${monthlyRate}`
+}
+console.log(mortgageCalculator("Patrick", 300000, 0.05, 20, 780));
 
 
 
@@ -78,6 +199,25 @@ 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){
+    let decreased = I * .50;
+    let newPrecent = I - decreased;
+        for (let i = 0; i < 10; i++){
+            let result = newPrecent += 0.005
+            // console.log(result.toFixed(3))
+            var iR =  result/12; 
+            var pay = N * 12;
+            var numerator = iR*(1+iR)**pay;
+            var denominator =  (1+iR)**pay-1;
+            var roundedDeno = Math.round((denominator*100)/100)
+            var monthlyRatePreRounded = P * (numerator/denominator);
+            var monthlyRate = monthlyRatePreRounded.toFixed()
+            console.log(
+                `{Name}, with an interest rate of ${result.toFixed(3)}, your monthly rate is $${monthlyRate}`
+                );
+        }
+    }
+    variableInterestRate(200000, 0.04, 30)