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```\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$   odd or even

def check_odd_even(number):
if number % 2 == 0:
return "Even"
else:
return "Odd"

user_input = int(input("Enter a number: "))

result = check_odd_even(user_input)
print(f"The number {user_input} is {result}.")

\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$  leap year

def is_leap_year(year):

if (year % 4 == 0 and year % 100 != 0) or (year % 400 == 0):
return True
else:
return False

user_input = int(input("Enter a year: "))

if is_leap_year(user_input):
print(f"The year {user_input} is a leap year.")
else:
print(f"The year {user_input} is not a leap year.")

\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$ prime nnumber

def is_prime(number):

if number > 1:

for i in range(2, int(number**0.5) + 1):
if (number % i) == 0:
return False  # It has a factor other than 1 and itself, so it's not prime
return True
else:
return False  # Numbers less than or equal to 1 are not prime

user_input = int(input("Enter a number: "))

if is_prime(user_input):
print(f"The number {user_input} is a prime number.")
else:
print(f"The number {user_input} is not a prime number.")

\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$ code to fibonacci series

def fibonacci_series(n):
fib_series = [0, 1]

while len(fib_series) < n:
next_term = fib_series[-1] + fib_series[-2]
fib_series.append(next_term)

return fib_series

num_terms = int(input("Enter the number of Fibonacci terms to generate: "))

result = fibonacci_series(num_terms)
print(f"Fibonacci series up to {num_terms} terms: {result}")

\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$ sum of n natural numbers

def sum_of_natural_numbers(n):
return n * (n + 1) // 2

num_natural_numbers = int(input("Enter the value of n: "))

result = sum_of_natural_numbers(num_natural_numbers)
print(f"The sum of the first {num_natural_numbers} natural numbers is: {result}")

\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$ draw a pattern

*
**
***

def draw_pattern(rows):
for i in range(1, rows + 1):
for j in range(i):
print("*", end=" ")
print()

num_rows = int(input("Enter the number of rows: "))
draw_pattern(num_rows)

\$\$\$\$\$\$\$\$\$\$\$\$ same for numbers

def draw_pattern(rows):
for i in range(1, rows + 1):
for j in range(1, i + 1):
print(j, end=" ")
print()

num_rows = int(input("Enter the number of rows: "))

draw_pattern(num_rows)

```