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prime number in python

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Rajitha Amarasinghe answered on June 18, 2021 Popularity 9/10 Helpfulness 5/10

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Comment

# 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.

Popularity 9/10 Helpfulness 5/10 Language python

Source: Grepper

Tags: python

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Contributed on Jun 04 2022

Rajitha Amarasinghe

0 Answers Avg Quality 2/10

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prime number in python

Comments(2)

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.")

Popularity 10/10 Helpfulness 7/10 Language python

Source: Grepper

Tags: python py

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Contributed on May 10 2022

Excited Earthworm

0 Answers Avg Quality 2/10

primes in python

Comments(1)

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

Popularity 10/10 Helpfulness 7/10 Language python

Source: Grepper

Tags: primes pr

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Contributed on Aug 13 2021

Old-fashioned Ostrich

0 Answers Avg Quality 2/10

prime number in python

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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")

Popularity 10/10 Helpfulness 7/10 Language python

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Tags: python py

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Contributed on Dec 19 2021

Impossible Impala

0 Answers Avg Quality 2/10

prime number program in python

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def prime_number(a):
    for i in range(2,a):
        if a%i == 0:
          return False
    return True
n = int(input("Enter a number = "))
print(prime_number(n))

Popularity 9/10 Helpfulness 6/10 Language python

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Tags: python py

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Contributed on Aug 13 2022

Anurag Daksh

0 Answers Avg Quality 2/10

prime number in python

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# Python function to check if a number prime or not.
print("Welcome to Prime Number Checker")

def prime_check(number):
    prime = True
    for num in range(2, number):
        if number % num == 0:
            prime = False
    if prime:
        print("It is prime")
    else:
        print("It is not prime")

number_to_check = int(input("Type the number to check: "))
prime_check(number = number_to_check)

Popularity 8/10 Helpfulness 6/10 Language python

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Tags: python

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Contributed on Dec 04 2022

Relieved Rattlesnake

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python prime number

Comment

def is_prime(n):
	if n == 0 or n == 1 or n == 4:
		return False
	for i in range(2, int(n/2)):
		if n % i == 0:
			return False
	return True

A relatively "faster" prime check.

It gets noticably slow once it gets to 8+ digits.

Popularity 8/10 Helpfulness 6/10 Language python

Source: Grepper

Tags: python

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Contributed on Jan 12 2023

OwO People

0 Answers Avg Quality 2/10

find a prime number in python

Comment

def prime_checker(number):
    is_prime = True #use a bool to flag prime number
    for i in range(2, number):# starts at 2 and loops until the range of number
        if number % i == 0:# if is divisible not a prime
            is_prime = False
    if is_prime == True:
        print(f"{number} is a prime number")
    else:
        print(f"{number} is a not a prime number.")

n = int(input("Check this number: "))#check a number for prime
prime_checker(number=n)#call the function

Popularity 9/10 Helpfulness 5/10 Language python

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Contributed on Sep 17 2022

Jeremy L

0 Answers Avg Quality 2/10

prime number python program

Comment

#prime number verification program
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")#this is out of the for loop suite.

Popularity 10/10 Helpfulness 5/10 Language python

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Contributed on Dec 16 2021

Gr@Y_orphan_ViLL@in##

0 Answers Avg Quality 2/10

prime number in python

Comment

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)

Popularity 10/10 Helpfulness 5/10 Language python

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Contributed on Jun 18 2021

Modern Mongoose

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python number prime

Comment

import math
def prime(n):
    nbd=0
    i=1
    while i<= (math.sqrt(n)) :
        if ((n % i) == 0):
            nbd=nbd+1
        i=i+1
    if nbd >1:
        return False 
    else :
        return True

Popularity 8/10 Helpfulness 5/10 Language python

Source: Grepper

Tags: python

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Contributed on Dec 21 2022

amir said

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prime number in python

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