Update a.py

Author: kushalrathod32

a.py

@@ -1,36 +1,53 @@
-
 """
-Check if a number is a prime number.
+This script demonstrates basic operations like greeting a user,
+checking prime numbers, generating primes up to a limit, and 
+calculating factorials.
 """
+def greet(name):
+    """Greets a user with a message."""
+    return f"Hello, {name}!"
+
 def is_prime(num):
+    """Checks if a number is prime."""
     if num <= 1:
         return False
-    for i in range(2, int(num ** 0.5) + 1):
+    for i in range(2, num):
         if num % i == 0:
             return False
     return True
 
-def count_primes(numbers):
-    """
-    Count the number of prime numbers in a list.
-    """
-    prime_count = 0
-    for number in numbers:
-        if is_prime(number):
-            prime_count += 1
-    return prime_count
+def prime_numbers_up_to(limit):
+    """Generates all prime numbers up to a specified limit."""
+    primes = []
+    for num in range(2, limit + 1):
+        if is_prime(num):
+            primes.append(num)
+    return primes
 
-def main():
-    """
-    Main function to demonstrate prime number checking.
-    """
-    numbers = [2, 3, 4, 5, 10, 15, 17, 19, 20, 23, 29]
-    primes = [num for num in numbers if is_prime(num)]
-    prime_count = count_primes(numbers)
+def factorial(n):
+    """Calculates the factorial of a number."""
+    if n in (0, 1):
+        return 1
+    result = 1
+    for i in range(2, n + 1):
+        result *= i
+    return result
 
-    print(f"Numbers: {numbers}")
-    print(f"Prime numbers: {primes}")
-    print(f"Total prime count: {prime_count}")
+def main():
+    """Main function to run various operations."""
+    print(greet("Alice"))
+    print("\nPrime numbers up to 50:")
+    primes = prime_numbers_up_to(50)
+    print(primes)
+    print("\nFactorial of 5:")
+    fact = factorial(5)
+    print(fact)
+    print("\nPrime numbers up to 100:")
+    primes_up_to_100 = prime_numbers_up_to(100)
+    print(primes_up_to_100)
+    print("\nFactorial of 10:")
+    fact_10 = factorial(10)
+    print(fact_10)
 
 if __name__ == "__main__":
     main()