function isPrime(num) {
    if (num <= 1) {
        return false;
    }
    for (let i = 2; i <= Math.sqrt(num); i++) {
        if (num % i === 0) {
            return false;
        }
    }
    return true;
}

function extractPrimes(start, end) {
    const primes = [];
    for (let number = start; number <= end; number++) {
        if (isPrime(number)) {
            primes.push(number);
        }
    }
    return primes;
}

function main() {
    const start = parseInt(prompt("Enter the starting number:"));
    const end = parseInt(prompt("Enter the ending number:"));

    if (isNaN(start) || isNaN(end) || start < 0 || end < 0) {
        console.log("Error: Starting and ending numbers must be positive whole numbers.");
    } else {
        const primeNumbers = extractPrimes(start, end);
        if (primeNumbers.length > 0) {
            console.log("Prime numbers in the range:", primeNumbers);
        } else {
            console.log("No prime numbers found in the specified range.");
        }
    }
}

main();