Python Program to Check Prime Number

To check prime number in python programming, you should have the knowledge of the following topics:

• Prime number
• Python if…else Statement
• Python for Loops

Method One: Python If … Else statement

# Python Code to Check Prime Number

#Variable definition and assignment

a = 3

#Taking user input

#a = int(input(“Enter a number: “))

if a > 1:

   # check for factors

   for i in range(2,a):

       if (a % i) == 0:

           print(a,”is not a prime number.”)

           print(i,”times”,a//i,”is”,a)

           break

   else:

       print(a,”is a prime number.”)

#If the input number is less than or equal to 1, then it is not prime

else:

   print(a,”is not a prime number.”)

Output
3 is a prime number.