Simple Prime Numbers in Python: From User Input to Range and Functions

There are many different kinds of numbers in the world, and it is challenging for us to differentiate between the numbers, so here we will discuss the prime number and how we can determine prime numbers using simple python programs. With the help of python, we can do many things with number. We can create simple prime number programs in python, prime number programs in python print 1 to 100, and prime numbers in python user input.

What is a prime number?

The prime number is a natural number greater than one and divisible by one or the number itself. The prime numbers are 2,3,5,7,11,13,17, etc. we can write simple python programs to find the prime numbers.

Simple Python Program to Check the Prime Number:

It is always a positive number, checked at the beginning of the program. You will divide the number you typed in by all the numbers to see if there are other positive divisors besides one and the number itself. The statement “number is not a prime number” is shown if any divisor is found. Or, the statement “number is a prime number” is displayed.

Python program :

num = 17

if num > 1:

for i in range(2, num//2):

if (num % i) == 0:

print(num, “is not a prime number”)



print(num, “is a prime number”)


print(num, “is not a prime number”)

Result: 17 is a prime number

Python Program to Find Prime Numbers in Range:

start = 1

end = 50

primes = [num for num in range(start, end+1) if all(num % i != 0 for i in range(2, int(num**0.5)+1)) and num > 1]

print(“Prime number between,” start, “and,” end, “are:”)


This program uses list comprehension to make a list of prime numbers in the range from start to end. The list comprehension checks to see if each number in the range meets two conditions: it can’t be divided by any number between 2 and its square root, and it has to be bigger than 1. If both needs are met, the number is added to the list of prime numbers.

Lastly, the example usage code sets the start and end to 1 and 50, respectively, and uses the list comprehension to make a list of prime numbers in that range. It then prints out the list of prime numbers that were made.

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Prime Number Program in Python to Print 1 To 100

One common task is to find all of the prime numbers that are between two other numbers. To do this, we can use the function we optimized and loop over a range of numbers to return all prime numbers.

Let us do it for the values from 1-100

Finding All Prime Numbers Between 1 and 100

prime_numbers = []

for num in range(1, 100):

    if is_prime(num):



# Returns:

 (2, 3, 5, 7, 11, 13, 17, 19, 23, 29, 31, 37, 41, 43, 47, 53, 59, 61, 67, 71, 73, 79, 83, 89, 97)

Prime Number Program in Python Using for Loop

Simple Prime Numbers in Python
Programmer working on web development code. Engineer programming in python, php, java script on computer. Vector illustration professional software developers concept

A program that, when given a positive integer n, comes back True if n is a prime number and False otherwise.

num = 500

if num > 1:

   # check for factors

   for i in range(2,num):

       if (num % i) == 0:

           print(num,”is not a prime number”)



       print(num,”is a prime number”)

# if the input number is less than

or equal to 1, it is not a prime number


   print(num,”is not a prime number”)

Output 500 is not a prime number.

The fastest method to find simple prime number programs in python

Instead of checking until n, we can check until n because a more prominent factor of n must be a multiple of an element of n that has already been checked. Now, let’s look at the code for the first way to improve performance: to check until n.

From math, import sqrt #n, where n is the number you want to check to see if it is prime.

# This flag shows the same thing whether n is prime or not.

prime-flag = 0

if(n > 1):

    for i in range(2, int(sqrt(n) + 1):

        if (n % i = = 0):

            prime_flag = 1


    if (prime_flag == 0):





    print (False)

Output is False

Print prime numbers from 1 ton in python.

Here’s a program that uses loop and while loop to print the prime numbers from 1 to N (10, 100, 500, 1000, etc.):

Python Programme to Check whether A given number is Prime Or Not

 No = int(input(” Please Enter any number: “))

 flag = zero

 for I in range(2, (No//2 + 1):

if(No % i == 0):

         flag = flag + one


 if (flag == zero and No 1= 1):

print(” %d is a Prime Nober” %No)


print(” %d is not a Prime Nober” %No)


Using python programming language to find the simple prime numbers, prime numbers in the range, or prime number programs in python using for loop. It makes the process easier for the user to find all these with the help of python programs. Overall these simple prime number program in python, python find prime numbers in the range, prime number program in python print 1 to 100, and prime number in python user input makes it very easy and accessible for the user to run these programs to get the outcome.

With this, we have to come to an end with our blog post. We hope that it was helpful for you to understand how to write simple prime number programs in python programming. To know more details, you can enroll in our programming certification courses.

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