Write a program in python to check whether a number is prime or not.

1. Here’s a Python code to check if a given number is prime or not:
   
   
   def is_prime(n):
   if n <= 1:
   return False
   elif n <= 3:
   return True
   elif n % 2 == 0 or n % 3 == 0:
   return False
   i = 5
   while i * i <= n:
   if n % i == 0 or n % (i + 2) == 0:
   return False
   i += 6
   return True
   
   # Test the function
   number = int(input(“Enter a number: “))
   if is_prime(number):
   print(f”{number} is a prime number”)
   else:
   print(f”{number} is not a prime number”
   
   
   

 

 

This code defines a function `is_prime()` that takes an integer `n` as input and returns `True` if `n` is a prime number, and `False` otherwise. Then, it prompts the user to enter a number, checks if it’s prime using the `is_prime()` function, and prints the result.