PYTHON

is prime python

def is_prime(n):
    for i in range(2,int(n**0.5)+1):
        if n%i==0:
            return False
    return True

prime number in python

def prime_number(n):
    c = 0
    for x in range(2, n):
        if n % x == 0:
            c = c + 1
    return c


n = int(input("Enter a number = "))
if prime_number(n) == 0:
    print("Prime number.")
else:
    print("Not prime number.")

is prime python

import math
def isPrimeNumber(n):
    if (n < 2):
        return False;
    sq = int(math.sqrt(n))
    for i in range(2, sq + 1):
        if (n % i == 0):
            return False
    return True

primes in python

from math import sqrt
for i in range(2, int(sqrt(num)) + 1):
    if num % i == 0:
        print("Not Prime")
        break
    print("Prime")

# Note: Use this if your num is big (ex. 10000 or bigger) for efficiency
# The result is still the same if the num is smaller

prime number in python

a=int(input('print number:'))
for i in range(2,a):
    if a%i !=0:
        continue
    else:
        print("Its not a prime number")
        break # here break is exicuted then it means else would not be exicuted.
else:
    print("Its a prime number")

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

python is prime

from sympy import isprime
isprime(23)

prime number in python

import math
a=[i for i in range(2,int(input('prime number range'))) if 0 not in [i%n for n in range(2,int(math.sqrt(i)))]]
print(a)

prime number in python

# Prime number:

n = int(input("Please enter your input number: "))
if n>1:
    for i in range(2,n):
        if n%i == 0:
            print("%d is a Not Prime."%n)
            break
    else:
        print("%d is a Prime."%n)
else:
    print("%d is a Not Prime."%n)
    
# Use to Definition Function:

'''
def Prime_number_chcek(n):
    if n>1:
        for i in range(2,n):
            if n%i == 0:
                return ("%d is a Not Prime."%n)
        return ("%d is a Prime."%n)
    return ("%d is a Not Prime."%n)

# Main Driver:
if __name__=="__main__":
    n = int(input("Enter your input number: "))
    print(Prime_number_chcek(n))
'''

prime number in python

# This shows how we can use for + else using a break in between

for x in range(1,101):
# if you want to find whether a user input is a prime number
# use the following insted of the first for loop
# x = int(input("Type a number: "))
    for i in range(2, x):
        if x % i == 0:
            print(x, "is not a prime number.")
            break
    else:
        print(x, "is a prime number.")

# This will print all the numbers from 1-100,
# in the same line will print whether it is a prime or not

# if you use the user input method
# when you type 9, the output will be:
# 9 is not a prime number.

# when you type 7, the output will be:
# 7 is a prime number.

how to see if a number is prime in python

def is_prime(n: int) -> bool:
    """Primality test using 6k+-1 optimization."""
    if n <= 3:
        return n > 1
    if n % 2 == 0 or n % 3 == 0:
        return False
    i = 5
    while i ** 2 <= n:
        if n % i == 0 or n % (i + 2) == 0:
            return False
        i += 6
    return True

python primes

def is_prime(n):
  for i in range(2,n):
    if (n%i) == 0:
      return False
  return True

check for prime in python

def is_prime(n: int) -> bool:
    """Primality test using 6k+-1 optimization."""
    import math
    if n <= 3:
        return n > 1
    if n % 2 == 0 or n % 3 == 0:
        return False
    i = 5
    while i <= math.sqrt(n):
        if n % i == 0 or n % (i + 2) == 0:
            return False
        i += 6
    return True

prime number in python

a=int(input("Enter number: "))
k=0
for i in range(2,a//2+1):
    if(a%i==0):
        k=k+1
if(k<=0):
    print("Number is prime")
else:
    print("Number isn't prime")

check if number is prime python

def check_if_prime():
    number = int(input("Enter number: "))
    
    prime_lists = [1,2,3]
    
    divisible_by = []
    if number in prime_lists:
        return divisible_by
    
    if number==0:
        return None
    
    for i in range(2,number):
        
        if number%i==0:
            divisible_by.append(i)
            
    return divisible_by
        
    
check_if_prime()

prime number in python

start_num , end_num = input("enter 2 number sepreted by ,:").split(",")
start_num , end_num = int(start_num) , int(end_num)

for number in range(start_num , end_num+1):
    is_prime = True
    for counter in range(2,number):
        value = number % counter
        if value == 0:
            is_prime = False
            break
    if is_prime == True:
        print(number)

python is prime

from math import sqrt, floor;

def is_prime(num):
    if num < 2: return False;
    if num == 2: return True;
    if num % 2 == 0: return False;
    for i in range(3,floor(sqrt(num))+1,2):
        if num % i == 0: return False;
    return True;

prime number in python

'''Write a Python script that prints prime numbers less than 20'''

print("Prime numbers between 1 and 20 are:")
ulmt=20;
for num in range(ulmt):
   # prime numbers are greater than 1
   if num > 1:
       for i in range(2,num):
           if (num % i) == 0:
               break
       else:
           print(num)

primes python

import math

def main():
    count = 3
    
    while True:
        isprime = True
        
        for x in range(2, int(math.sqrt(count) + 1)):
            if count % x == 0: 
                isprime = False
                break
        
        if isprime:
            print count
        
        count += 1

prime number in python

prime=int(input("Enter a number:"))
buffer=0
for i in range(2,prime):
    if prime%i==0:
        print(prime," is not a prime number")
        buffer=1
        break
if buffer==0:
    print(prime," is a prime number")

is prime python

def is_prime(n):
  return bool(n&1)