demo.js

//function to calculate the area of a circle
function calculateArea(radius) {
    return Math.PI * Math.pow(radius, 2);
}

//function to validate an email address using regex
function validateEmail(email) {
    const emailRegex = /^[^\s@]+@[^\s@]+\.[^\s@]+$/;
    return emailRegex.test(email);
}

//function to fetch data from an API and log the response
async function fetchData(url) {
    try {
        const response = await fetch(url);
        if (!response.ok) {
            throw new Error(`HTTP error! status: ${response.status}`);
        }
        const data = await response.json();
        console.log(data);
    } catch (error) {
        console.error('Error fetching data:', error);
    }
}

//function to convert any currency to INR using a fixed exchange rate function
function convertToINR(amount, currency) {
    const exchangeRates = {
        USD: 74.85,
        EUR: 88.50,
        GBP: 103.20,
        JPY: 0.68
    };
    if (Object.hasOwn(exchangeRates, currency)) {
        return amount * exchangeRates[currency];
    } else {        
        throw new Error('Unsupported currency');
    }
}