Added Roman Numeral Calculator (#855)

Rakesh9100 · May 25, 2024 · 74a54f0 · 74a54f0
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diff --git a/Calculators/Roman-Numeral-Calculator/README.md b/Calculators/Roman-Numeral-Calculator/README.md
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+# <p align="center">Roman Numeral Calculator</p>
+
+## Description :-
+
+Calculator which takes the value in Roman numeral form and gives the results in decimal format.
+This calculator only works within the specified range of standard Roman numeral form i.e. within the range 1 to 3999.
+
+## Tech Stacks :-
+
+- HTML
+- CSS
+- JavaScript
+
+## Screenshots :-
+
+![image](https://github.com/Rakesh9100/CalcDiverse/assets/73993775/3328c033-55ca-42a8-866e-60afbbc151cd)
diff --git a/Calculators/Roman-Numeral-Calculator/index.html b/Calculators/Roman-Numeral-Calculator/index.html
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+<!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>Roman Numeral Calculator</title>
+</head>
+
+<body>
+    <div class="converter">
+        <h1>Roman Numeral Calculator</h1>
+        <label for="romanNumeral">Enter Roman Numeral following the standard rules of Roman numeral notation:</label>
+        <input type="text" id="romanNumeral" placeholder="e.g., XIV">
+        <button onclick="convertRomanToDecimal()">Convert</button>
+        <div id="result"></div>
+    </div>
+    <script src="./script.js"></script>
+</body>
+
+</html>
diff --git a/Calculators/Roman-Numeral-Calculator/script.js b/Calculators/Roman-Numeral-Calculator/script.js
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+function convertRomanToDecimal() {
+    const roman = document.getElementById('romanNumeral').value.toUpperCase();
+    const romanToDecimalMap = {
+        'I': 1,
+        'V': 5,
+        'X': 10,
+        'L': 50,
+        'C': 100,
+        'D': 500,
+        'M': 1000
+    };
+
+    let decimal = 0;
+    let prevValue = 0;
+
+    for (let i = roman.length - 1; i >= 0; i--) {
+        const currentValue = romanToDecimalMap[roman[i]];
+        if (!currentValue) {
+            document.getElementById('result').innerText = "Invalid Roman Numeral";
+            return;
+        }
+
+        if (currentValue < prevValue) {
+            decimal -= currentValue;
+        } else {
+            decimal += currentValue;
+        }
+        prevValue = currentValue;
+    }
+
+    document.getElementById('result').innerText = `Decimal: ${decimal}`;
+}
diff --git a/Calculators/Roman-Numeral-Calculator/style.css b/Calculators/Roman-Numeral-Calculator/style.css
@@ -0,0 +1,54 @@
+body {
+    font-family: Arial, sans-serif;
+    display: flex;
+    justify-content: center;
+    align-items: center;
+    height: 100vh;
+    background: linear-gradient(to right, #da6854,#ee3405);
+}
+
+.converter {
+    background-color: white;
+    padding: 20px;
+    border-radius: 10px;
+    box-shadow: 0 0 10px rgba(0,0,0,0.1);
+    width: 300px;
+}
+
+h1 {
+    text-align: center;
+}
+
+label {
+    display: block;
+    margin: 10px 0 5px;
+}
+
+input {
+    width: 94%;
+    padding: 8px;
+    margin-bottom: 10px;
+    border: 1px solid #ddd;
+    border-radius: 5px;
+}
+
+button {
+    width: 100%;
+    padding: 10px;
+    background-color: #c73d07;
+    color: white;
+    border: none;
+    border-radius: 5px;
+    cursor: pointer;
+}
+
+button:hover {
+    background-color: #d4804f;
+}
+
+#result {
+    margin-top: 20px;
+    text-align: center;
+    font-size: 1.2em;
+}
+
diff --git a/index.html b/index.html
@@ -1770,6 +1770,20 @@ <h3>Converts Rectangular form into Polar form and vice versa.</h3>
                 </div>
             </div>
         </div>
+        <div class="box">
+            <div class="content">
+                <h2>Roman Numeral Calculator</h2>
+                <h3>Converts Roman Numeral form into Decimal form.</h3>
+                <div class="card-footer">
+                    <a href="./Calculators/Roman-Numeral-Calculator/index.html" target="_blank">
+                        <button>Try Now</button>
+                    </a>
+                    <a href="https://github.com/Rakesh9100/CalcDiverse/tree/main/Calculators/Roman-Numeral-Calculator" title="Source Code" target="_blank">
+                        <img src="./assets/images/github.png" alt="Source Code"></img>
+                    </a>
+                </div>
+            </div>
+        </div>
         <div class="box">
             <div class="content">
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