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PROGRAMMINGMACHINE-LEARNING-->View question

Write a Program to print all prime numbers up to a given number?

its about Write a Program to print all prime numbers up to a given number


Asked On2019-09-03 18:30:10 by:Annaliya

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A  approach is based on the fact that one of the divisors must be smaller than or equal to √n. So we check for divisibility only till √n.

# function to check if the number is

# prime or not

def isPrime(n) :

    # Corner cases

    if (n <= 1) :

        return False

    if (n <= 3) :

        return True

  

    # This is checked so that we can skip

    # middle five numbers in below loop

    if (n % 2 == 0 or n % 3 == 0) :

        return False

  

    i = 5

    while(i * i <= n) :

        if (n % i == 0 or n % (i + 2) == 0) :

            return False

        i = i + 6

  

    return True

 

# print all prime numbers

# less than equal to N

def printPrime(n):

    for i in range(2, n + 1):

        if isPrime(i):

            print (i, end =" ")

   

n = 7           

printPrime(n)  


Answerd on:2019-09-04 Answerd By:Tanisha-Garg

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