Write a Python function to check if a given number is a prime number.
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Here’s a Python function that checks if a given number is a prime number:
def is_prime(n):
if n <= 1:
return False
if n == 2:
return True
if n % 2 == 0:
return False
for i in range(3, int(n**0.5) + 1, 2):
if n % i == 0:
return False
return True