Added Catalan Number Calculator (#1393)

Rakesh9100 · Jun 24, 2024 · c743df6 · c743df6
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diff --git a/Calculators/Catalan-Number-Calculator/README.md b/Calculators/Catalan-Number-Calculator/README.md
@@ -0,0 +1,15 @@
+# <p align="center">Catalan Number Calculator</p>
+
+## Description :-
+
+Calculates the n<sup>th</sup> Catalan Number with the value of n entered by the user.
+
+## Tech Stacks :-
+
+- HTML
+- CSS
+- JavaScript
+
+## Screenshots :-
+
+![image](https://github.com/Rakesh9100/CalcDiverse/assets/73993775/67259e46-ea5c-4559-8e44-9a8c4ca60703)
diff --git a/Calculators/Catalan-Number-Calculator/index.html b/Calculators/Catalan-Number-Calculator/index.html
@@ -0,0 +1,25 @@
+<!DOCTYPE html>
+<html lang="en">
+<head>
+    <meta charset="UTF-8">
+    <meta name="viewport" content="width=device-width, initial-scale=1.0">
+    <link rel="stylesheet" href="style.css">
+    <title>Catalan Number Calculator</title>
+</head>
+<body>
+    <header>
+        <h1>Nth Catalan Number Calculator</h1>
+    </header>
+    <main>
+        <div class="container">
+            <form name="myform">
+                <label for="no">Enter the term you want to find:</label>
+                        <input type="number" name="term" id="no">
+                        <button type="button" onclick="findCatalanNumber()">Find Catalan Number</button>
+            </form>
+            <div id="catalanNumbers"></div>
+        </div>
+    </main>
+    <script src="script.js"></script>
+</body>
+</html>
diff --git a/Calculators/Catalan-Number-Calculator/script.js b/Calculators/Catalan-Number-Calculator/script.js
@@ -0,0 +1,39 @@
+const fact = []
+fact.push(1)
+for (let i = 1; i <= 100; i++) {
+    fact.push(fact[i - 1] * i);
+}
+
+function findCatalanNumber() {
+    const term = document.forms.myform.term.value;
+    const n = parseInt(term, 10);
+    //Validate User Input
+    if (n === "" || n < 0 || n === 0 || n > 32 || Number.isNaN(n)) {
+        alert('Please enter a valid number between 1 and 32');
+    } else {
+        myElement = document.getElementById("catalanNumbers");
+        const num = catalanNumber(n);
+        const st = num.toString();
+        if (n % 10 === 1 && n != 11) {
+            myElement.textContent = "The value of the " + n.toString() + "st Catalan Number is " + st;
+        } else if (n % 10 === 2 && n != 12) {
+            myElement.textContent = "The value of the " + n.toString() + "nd Catalan Number is " + st;
+        } else if (n % 10 === 3 && n != 13) {
+            myElement.textContent = "The value of the " + n.toString() + "rd Catalan Number is " + st;
+        } else {
+            myElement.textContent = "The value of the " + n.toString() + "th Catalan Number is " + st;
+        }
+    }
+}
+
+function catalanNumber(val) {
+    let numerator = factorial(2 * val);
+    let firstDenominator = factorial(val + 1);
+    let secondDenominator = factorial(val);
+    let denominator = firstDenominator * secondDenominator;
+    return Math.floor(numerator / denominator);
+}
+
+function factorial(j) {
+    return fact[j];
+}
diff --git a/Calculators/Catalan-Number-Calculator/style.css b/Calculators/Catalan-Number-Calculator/style.css
@@ -0,0 +1,54 @@
+body {
+    background-color: #f1ffb1;
+    margin: 0;
+    display: flex;
+    flex-direction: column;
+    align-items: center;
+    justify-content: center;
+    height: 100vh;
+}
+
+h1 {
+    color: #8C1C1C;
+    margin-bottom: 40px;
+}
+
+.container {
+    display: flex;
+    flex-direction: column;
+    color: rgb(78, 2, 78);
+    font-size: large;
+    align-items: center;
+    justify-content: center;
+    background-color: white;
+    border-radius: 30px;
+    padding: 100px;
+    box-shadow: 0 0 10px rgba(0, 0, 0, 0.1);
+}
+
+form {
+    display: flex;
+    flex-direction: column;
+    align-items: center;
+    margin-bottom: 20px;
+}
+
+label {
+    margin-bottom: 20px;
+    font-weight: bold;
+}
+
+input {
+    padding: 8px;
+    margin-bottom: 20px;
+    width: 150px;
+}
+
+button {
+    padding: 10px;
+    background-color: red;
+    color: white;
+    border: none;
+    cursor: pointer;
+    font-size: medium;
+}
diff --git a/index.html b/index.html
@@ -806,6 +806,20 @@ <h3>Calculates an individual's carbon footprint based on some input parameters.<
                 </div>
             </div>
         </div>
+        <div class="box">
+            <div class="content">
+                <h2>Catalan Number Calculator</h2>
+                <h3>Calculates the nth Catalan Number with the value of n entered by the user.</h3>
+                <div class="card-footer">
+                    <a href="./Calculators/Catalan-Number-Calculator/index.html" target="_blank">
+                        <button>Try Now</button>
+                    </a>
+                    <a href="https://github.com/Rakesh9100/CalcDiverse/tree/main/Calculators/Catalan-Number-Calculator" title="Source Code" target="_blank">
+                        <img src="./assets/images/github.png" alt="Source Code"></img>
+                    </a>
+                </div>
+            </div>
+        </div>
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