What is a function in Python?

A function is a reusable block of code used to perform a specific task. It helps reduce code repetition and makes programs more organized and efficient.

Example:

def is_prime(num):

if num <= 1:

return False

for i in range(2, num):

if num % i == 0:

return False

return True

# Example usage

number = 7

if is_prime(number):

print(“Prime Number”)

else:

print(“Not a Prime Number”)

Output:

Prime Number

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