Roman to Integer Converter

// Function to convert Roman numeral to integer
function romanToInt(s) {
    const romanMap = {
        'I': 1,
        'V': 5,
        'X': 10,
        'L': 50,
        'C': 100,
        'D': 500,
        'M': 1000
    };

    let total = 0;

    for (let i = 0; i < s.length; i++) {
        const current = romanMap[s[i]];
        const next = romanMap[s[i + 1]];

        // If the next numeral is larger, subtract current value
        if (next && current < next) {
            total -= current;
        } else {
            total += current;
        }
    }

    return total;
}

// Example usage
console.log(romanToInt("III"));    // Output: 3
console.log(romanToInt("IV"));     // Output: 4
console.log(romanToInt("IX"));     // Output: 9
console.log(romanToInt("LVIII"));  // Output: 58
console.log(romanToInt("MCMXCIV"));// Output: 1994