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Python Program To Check Prime Number

Here in this tutorial, we will check by using loop and if...else statement whether an integer is a prime number or not.

An integer is a prime number only if it is divisible by one or itself such as, 2, 3, 5, 7, 11, etc are prime numbers. But, 6 is not prime as it is more than 2 factors i.e. 1, 2 and 3.


Python Code

# Python program to check if the input number is prime or not num = 501 # take input from the user # num = int(input("Enter a number: ")) # prime numbers are greater than 1 if num > 1: # check for factors for i in range(2,num): if (num % i) == 0: print(num,"is not a prime number") print(i,"times",num//i,"is",num) break else: print(num,"is a prime number") # if input number is less than # or equal to 1, it is not prime else: print(num,"is not a prime number")

Output

501 is a prime number as it is divisible of 1 and itself

So, test the program by changing the value in the program.