acesdit · Aaditya-2407 · Oct 20, 2025 · Oct 20, 2025
diff --git a/Domains/Frontend/MiniProjects/EMICalculator/README.md b/Domains/Frontend/MiniProjects/EMICalculator/README.md
@@ -0,0 +1,12 @@
+**Contributor:** Aaditya-2407
+
+## Description
+A simple utility to calculate the estimated monthly payment for a loan based on the loan amount, annual interest rate, and term in years.
+
+## Tech Stack
+- HTML
+- CSS
+- JavaScript (Vanilla)
+
+## How to Run
+1. Open the `index.html` file in your web browser.
diff --git a/Domains/Frontend/MiniProjects/EMICalculator/index.html b/Domains/Frontend/MiniProjects/EMICalculator/index.html
@@ -0,0 +1,31 @@
+<!DOCTYPE html>
+<html lang="en">
+<head>
+    <meta charset="UTF-8">
+    <meta name="viewport" content="width=device-width, initial-scale=1.0">
+    <title>Loan Calculator</title>
+    <link rel="stylesheet" href="style.css">
+</head>
+<body>
+    <div class="calculator-container">
+        <h1>Loan Calculator</h1>
+        <div class="input-group">
+            <label for="loan-amount">Loan Amount ($)</label>
+            <input type="number" id="loan-amount" placeholder="Enter loan amount">
+        </div>
+        <div class="input-group">
+            <label for="interest-rate">Annual Interest Rate (%)</label>
+            <input type="number" id="interest-rate" placeholder="Enter annual interest rate">
+        </div>
+        <div class="input-group">
+            <label for="loan-term">Loan Term (Years)</label>
+            <input type="number" id="loan-term" placeholder="Enter loan term in years">
+        </div>
+        <button id="calculate-btn">Calculate</button>
+        <div id="result-container" class="result">
+            <h2>Monthly Payment: <span id="monthly-payment">$0.00</span></h2>
+        </div>
+    </div>
+    <script src="script.js"></script>
+</body>
+</html>
diff --git a/Domains/Frontend/MiniProjects/EMICalculator/script.js b/Domains/Frontend/MiniProjects/EMICalculator/script.js
@@ -0,0 +1,53 @@
+const loanAmountInput = document.getElementById('loan-amount');
+const interestRateInput = document.getElementById('interest-rate');
+const loanTermInput = document.getElementById('loan-term');
+const calculateBtn = document.getElementById('calculate-btn');
+const monthlyPaymentSpan = document.getElementById('monthly-payment');
+const resultContainer = document.getElementById('result-container');
+
+function calculateMonthlyPayment() {
+    const principal = parseFloat(loanAmountInput.value);
+    const annualInterestRate = parseFloat(interestRateInput.value);
+    const years = parseFloat(loanTermInput.value);
+
+    // Clear previous result or error messages
+    monthlyPaymentSpan.textContent = '$0.00'; 
+    resultContainer.style.display = 'none'; // Hide result initially
+
+    if (isNaN(principal) || isNaN(annualInterestRate) || isNaN(years) || principal <= 0 || annualInterestRate < 0 || years <= 0) {
+        // Optionally display an error message
+        // alert('Please enter valid positive numbers for all fields.');
+        return; // Stop calculation if input is invalid
+    }
+
+    const monthlyInterestRate = annualInterestRate / 100 / 12;
+    const numberOfPayments = years * 12;
+
+    // Handle edge case: 0% interest rate
+    if (monthlyInterestRate === 0) {
+         const monthlyPayment = principal / numberOfPayments;
+         monthlyPaymentSpan.textContent = `$${monthlyPayment.toFixed(2)}`;
+         resultContainer.style.display = 'block';
+         return;
+    }
+
+    // Standard loan formula: M = P [ i(1 + i)^n ] / [ (1 + i)^n – 1]
+    const monthlyPayment = principal * (monthlyInterestRate * Math.pow(1 + monthlyInterestRate, numberOfPayments)) / 
+        (Math.pow(1 + monthlyInterestRate, numberOfPayments) - 1);
+
+    if (isFinite(monthlyPayment)) {
+        monthlyPaymentSpan.textContent = `$${monthlyPayment.toFixed(2)}`;
+        resultContainer.style.display = 'block';
+    } else {
+         // Should not happen with valid inputs, but good to handle
+         monthlyPaymentSpan.textContent = 'Error'; 
+         resultContainer.style.display = 'block';
+    }
+}
+
+calculateBtn.addEventListener('click', calculateMonthlyPayment);
+
+// Optional: Calculate on input change as well
+// [loanAmountInput, interestRateInput, loanTermInput].forEach(input => {
+//     input.addEventListener('input', calculateMonthlyPayment);
+// });
diff --git a/Domains/Frontend/MiniProjects/EMICalculator/style.css b/Domains/Frontend/MiniProjects/EMICalculator/style.css
@@ -0,0 +1,81 @@
+body {
+    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
+    display: flex;
+    justify-content: center;
+    align-items: center;
+    height: 100vh;
+    background-color: #f0f2f5;
+    margin: 0;
+}
+
+.calculator-container {
+    width: 90%;
+    max-width: 420px;
+    padding: 2rem;
+    background-color: #ffffff;
+    border-radius: 16px;
+    box-shadow: 0 10px 20px rgba(0, 0, 0, 0.1);
+}
+
+h1 {
+    color: #333;
+    text-align: center;
+    margin-bottom: 1.5rem;
+}
+
+.input-group {
+    margin-bottom: 1.25rem;
+}
+
+.input-group label {
+    display: block;
+    margin-bottom: 0.5rem;
+    color: #555;
+    font-weight: 500;
+}
+
+.input-group input {
+    width: 100%;
+    padding: 0.75rem;
+    border: 1px solid #ddd;
+    border-radius: 8px;
+    box-sizing: border-box;
+    font-size: 1rem;
+}
+
+button {
+    font-size: 1rem;
+    font-weight: 600;
+    color: #ffffff;
+    background-color: #007aff;
+    border: none;
+    padding: 0.75rem 1.5rem;
+    border-radius: 8px;
+    cursor: pointer;
+    transition: background-color 0.2s ease;
+    width: 100%;
+    margin-top: 0.5rem;
+}
+
+button:hover {
+    background-color: #0056b3;
+}
+
+.result {
+    margin-top: 1.5rem;
+    text-align: center;
+    padding: 1rem;
+    background-color: #f9f9f9;
+    border-radius: 8px;
+}
+
+.result h2 {
+    font-size: 1.25rem;
+    color: #333;
+    margin: 0;
+}
+
+#monthly-payment {
+    color: #007aff;
+    font-weight: 600;
+}
diff --git a/Domains/Frontend/MiniProjects/LoanCalculator/._index.html b/Domains/Frontend/MiniProjects/LoanCalculator/._index.html
diff --git a/Domains/Frontend/MiniProjects/LoanCalculator/README.md b/Domains/Frontend/MiniProjects/LoanCalculator/README.md
@@ -0,0 +1,12 @@
+**Contributor:** Aaditya-2407
+
+## Description
+A simple utility to calculate the estimated monthly payment for a loan based on the loan amount, annual interest rate, and term in years.
+
+## Tech Stack
+- HTML
+- CSS
+- JavaScript (Vanilla)
+
+## How to Run
+1. Open the `index.html` file in your web browser.
diff --git a/Domains/Frontend/MiniProjects/LoanCalculator/index.html b/Domains/Frontend/MiniProjects/LoanCalculator/index.html
@@ -0,0 +1,31 @@
+<!DOCTYPE html>
+<html lang="en">
+<head>
+    <meta charset="UTF-8">
+    <meta name="viewport" content="width=device-width, initial-scale=1.0">
+    <title>Loan Calculator</title>
+    <link rel="stylesheet" href="style.css">
+</head>
+<body>
+    <div class="calculator-container">
+        <h1>Loan Calculator</h1>
+        <div class="input-group">
+            <label for="loan-amount">Loan Amount ($)</label>
+            <input type="number" id="loan-amount" placeholder="Enter loan amount">
+        </div>
+        <div class="input-group">
+            <label for="interest-rate">Annual Interest Rate (%)</label>
+            <input type="number" id="interest-rate" placeholder="Enter annual interest rate">
+        </div>
+        <div class="input-group">
+            <label for="loan-term">Loan Term (Years)</label>
+            <input type="number" id="loan-term" placeholder="Enter loan term in years">
+        </div>
+        <button id="calculate-btn">Calculate</button>
+        <div id="result-container" class="result">
+            <h2>Monthly Payment: <span id="monthly-payment">$0.00</span></h2>
+        </div>
+    </div>
+    <script src="script.js"></script>
+</body>
+</html>
diff --git a/Domains/Frontend/MiniProjects/LoanCalculator/script.js b/Domains/Frontend/MiniProjects/LoanCalculator/script.js
@@ -0,0 +1,35 @@
+const loanAmountInput = document.getElementById('loan-amount');
+const interestRateInput = document.getElementById('interest-rate');
+const loanTermInput = document.getElementById('loan-term');
+const calculateBtn = document.getElementById('calculate-btn');
+const monthlyPaymentSpan = document.getElementById('monthly-payment');
+const resultContainer = document.getElementById('result-container');
+
+function calculateMonthlyPayment() {
+    const principal = parseFloat(loanAmountInput.value);
+    const annualInterestRate = parseFloat(interestRateInput.value);
+    const years = parseFloat(loanTermInput.value);
+
+    if (isNaN(principal) || isNaN(annualInterestRate) || isNaN(years) || principal <= 0 || annualInterestRate <= 0 || years <= 0) {
+        monthlyPaymentSpan.textContent = '$0.00';
+        resultContainer.style.display = 'block';
+        return;
+    }
+
+    const monthlyInterestRate = annualInterestRate / 100 / 12;
+    const numberOfPayments = years * 12;
+
+    // M = P [ i(1 + i)^n ] / [ (1 + i)^n – 1]
+    const monthlyPayment = principal * (monthlyInterestRate * Math.pow(1 + monthlyInterestRate, numberOfPayments)) / 
+        (Math.pow(1 + monthlyInterestRate, numberOfPayments) - 1);
+
+    if (isFinite(monthlyPayment)) {
+        monthlyPaymentSpan.textContent = `$${monthlyPayment.toFixed(2)}`;
+        resultContainer.style.display = 'block';
+    } else {
+        monthlyPaymentSpan.textContent = '$0.00';
+        resultContainer.style.display = 'block';
+    }
+}
+
+calculateBtn.addEventListener('click', calculateMonthlyPayment);
diff --git a/Domains/Frontend/MiniProjects/LoanCalculator/style.css b/Domains/Frontend/MiniProjects/LoanCalculator/style.css
@@ -0,0 +1,81 @@
+body {
+    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
+    display: flex;
+    justify-content: center;
+    align-items: center;
+    height: 100vh;
+    background-color: #f0f2f5;
+    margin: 0;
+}
+
+.calculator-container {
+    width: 90%;
+    max-width: 420px;
+    padding: 2rem;
+    background-color: #ffffff;
+    border-radius: 16px;
+    box-shadow: 0 10px 20px rgba(0, 0, 0, 0.1);
+}
+
+h1 {
+    color: #333;
+    text-align: center;
+    margin-bottom: 1.5rem;
+}
+
+.input-group {
+    margin-bottom: 1.25rem;
+}
+
+.input-group label {
+    display: block;
+    margin-bottom: 0.5rem;
+    color: #555;
+    font-weight: 500;
+}
+
+.input-group input {
+    width: 100%;
+    padding: 0.75rem;
+    border: 1px solid #ddd;
+    border-radius: 8px;
+    box-sizing: border-box;
+    font-size: 1rem;
+}
+
+button {
+    font-size: 1rem;
+    font-weight: 600;
+    color: #ffffff;
+    background-color: #007aff;
+    border: none;
+    padding: 0.75rem 1.5rem;
+    border-radius: 8px;
+    cursor: pointer;
+    transition: background-color 0.2s ease;
+    width: 100%;
+    margin-top: 0.5rem;
+}
+
+button:hover {
+    background-color: #0056b3;
+}
+
+.result {
+    margin-top: 1.5rem;
+    text-align: center;
+    padding: 1rem;
+    background-color: #f9f9f9;
+    border-radius: 8px;
+}
+
+.result h2 {
+    font-size: 1.25rem;
+    color: #333;
+    margin: 0;
+}
+
+#monthly-payment {
+    color: #007aff;
+    font-weight: 600;
+}