Python prime check

Determine if number is prime python

# Time Efficient Primality Check in Python

def primeCheck(n):
    # 0, 1, even numbers greater than 2 are NOT PRIME
    if n==1 or n==0 or (n % 2 == 0 and n > 2):
        return "Not prime"
    else:
        # Not prime if divisable by another number less
        # or equal to the square root of itself.
        # n**(1/2) returns square root of n
        for i in range(3, int(n**(1/2))+1, 2):
            if n%i == 0:
                return "Not prime"
        return "Prime"

Python prime check

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

Similar codes

0 vote264 views1 answer
Python split() source code
Python
0 vote241 views1 answer
Updating file multiple times in pandas
Python
1 vote262 views1 answer
The operands of the logical operators should be boolean expressions, but python is not very strict. any nonzero number is interpreted as true.
Python
0 vote243 views1 answer
Load text file line in listbox python tkinter site:stackoverflow.com
Python
0 vote247 views1 answer
Python test if string begins with python
Python
0 vote254 views1 answer
How to bulk update in mongodb using python
Python
23 votes244 views2 answers
How to replace zero value in python dataframe
Python
0 vote258 views1 answer
Pandas column by index
Python
1 vote311 views1 answer
Django class based views ListView
Python Django
30 votes278 views3 answers
Python newline character
Python