# Python program to check whether a number is Prime or not

In this article, you will learn to find whether the number is a prime number or not.

#### What is a Prime number?

prime number is a whole number greater than 1 whose only factors are 1 and itself. A factor is a whole number that can be divided evenly into another number.

The first few prime numbers are 2, 3, 5, 7, 11, 13, 17, 19, 23, and 29.

#### Program

 ``` 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21``` ```# prime number in python # first we will take input from the user to check is prime number or not num = int(input("Enter number to check: ")) # Prime number is always greater than 1 if num > 1: # now divide the number by 2 to number itself for i in range(2, int(num/2)+1): # And check the reminder is zero if (num % i) == 0: # if reminder is zero than the number is not a prime number print(num, "is not a prime number") break else: print(num, "is a prime number") else: print(num, "is not a prime number") # prime number in python - docodehere.com ```

#### Output

Enter number to check: 23 23 is a prime number

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