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Parker williams #1

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parkster246 Jun 9, 2020
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71 changes: 60 additions & 11 deletions index.js
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Original file line number Diff line number Diff line change
Expand Up @@ -4,8 +4,14 @@
/* 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.
*/



var p = 200000;
console.log(p);
var interestRate = 0.05;
console.log(interestRate);
var years = 30;
console.log(years);
var name = 'Parker';
console.log(name);


// 🏡 Task 1.5: Simple Math
Expand All @@ -14,7 +20,10 @@
(1) Create a variable called `monthlyInterestRate` and give it the value of interest rate divided by 12.
(2) Create another variable called `periods` and give it the value of years*12.
*/

var monthlyInterestRate = interestRate / 12;
console.log(monthlyInterestRate);
var periods = years * 12;
console.log(periods);



Expand All @@ -25,7 +34,7 @@ M = P [ I ( 1 + I )^N ] / [ ( 1 + I )^N – 1 ]

Hint: while these calculations can be done in one line, it might be helpful to create seperate variables to hold parts of your equation. That might look like this:

(1) Create a variable called n1 and set it equal to (1 + I )^N
(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
(4) Create a variable called denominator and set it equal to n1 - 1
Expand All @@ -35,7 +44,16 @@ 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 n1 = Math.pow((1 + monthlyInterestRate), periods);
console.log(n1);
var n2 = n1 * monthlyInterestRate;
console.log(n2);
var numerator = n1 * monthlyInterestRate;
console.log(numerator);
var denominator = n1 - 1;
console.log(denominator);
var monthlyRate = p * (numerator / denominator);
console.log(monthlyRate);



Expand All @@ -44,8 +62,10 @@ 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(name, monthlyRate){
return name + ', your monthly rate is ' + monthlyRate;
}
console.log(mortgageCalculator(name, monthlyRate));



Expand All @@ -55,7 +75,11 @@ If your name is `Oscar` mortgageCalculator() should return "Oscar, your monthly
For example,
mortgageCalculator(200000, 0.05, 30); <-- should return 1,073.64
*/

function mortgageCalculator(P, I, N){
let monthlyRate = p * ((monthlyInterestRate * Math.pow((1 + monthlyInterestRate), periods)) / (Math.pow((1 + monthlyInterestRate), periods) -1));
return monthlyRate;
}
console.log(mortgageCalculator(200000, 0.05, 30))



Expand All @@ -67,8 +91,22 @@ Then, add control flow within your function such that IF creditScore is above 74

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.
*/


let C = 700;
function mortgageCalculator(P, I, N, C){
if (C > 740){
I = I - 0.005;
}
else if(C < 660){
I = I + 0.005;
}
let name = "Parker";
let monthlyInterestRate = I / 12;
let periods = years * 12;
let monthlyRate = p * ((monthlyInterestRate * Math.pow((1 + monthlyInterestRate), periods)) / (Math.pow((1 + monthlyInterestRate), periods) -1));
return name + ', your monthly rate is ' + monthlyRate;

}
console.log(mortgageCalculator(200000, 0.05, 30, 780));


// 🏡 Task 6: Loops
Expand All @@ -86,7 +124,18 @@ For example, variableInterestRate(200000, 0.04, 30) should console.log:
"{Name}, with an interest rate of 0.055, your monthly rate is $1136"
"{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 < 10; i++){
let monthlyInterestRate = I / 12;
let periods = years * 12;
let monthlyRate = p * ((monthlyInterestRate * Math.pow((1 + monthlyInterestRate), periods)) / (Math.pow((1 + monthlyInterestRate), periods) -1));
console.log(`${name}, with an interest of ${I.toFixed(3)}, your monthly rate is $${monthlyRate}`)
I += 0.005
}

}
console.log(variableInterestRate(200000, 0.04, 30))



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