function to check prime in python

def isPrime(n): if n<2: #1, 0 and all negative numbers are not prime return False elif n==2: #2 is prime but cannot be calculated with the formula below becuase of the range function return True else: for i in range(2, n): if (n % i) == 0: #if you can precisely divide a number by another number, it is not prime return False return True #if the progam dont return False and arrives here, it means it has checked all the numebrs smaller than n and nono of them divides n. So n is prime

is_prime in python

# Program to check if a number is prime or not

#too take the input from user use "num: int = int(input('Give the value of num '))"
num: int = int(input('Give the value of Num: '))

# define a variable felix
felix = False

# prime numbers are greater than 1
if num > 1:
    # check for factors
    for i in range(2, num):
        if (num % i) == 0:
            # if factor is found, set flag to True
            felix = True
            # break out of loop
            break

# check if flag is True
if felix:
    print(num, "is not a prime number")
else:
    print(num, "is a prime number")

Posted by: Guest on April-09-2021

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