Python Program to Print All Prime Numbers Between 1 to N

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Hi Dev,

In this short tutorial we will cover an Python Program to Print All Prime Numbers Between 1 to N. it's simple example of print n prime numbers in python. you will learn How to Display all Prime Numbers from 1 to N in Python. This post will give you simple example of Program for Prime numbers between two numbers in Python. You just need to some step to done Write a Python Program to print Prime Numbers from 1 to N using Loop.

Python program to print prime numbers from 1 to n; In this tutorial, you will learn how to print prime numbers from 1 to n (10, 100, 500, 1000) using for loop and while loop in python.

let's see below simple example with output:

Example 1: Python Program to find Prime Number using For Loop

Python Program to Check A given Number is Prime Or Not
 Num = int(input(" Please Enter any Number: "))
 count = 0
 for i in range(2, (Num//2 + 1)):
     if(Num % i == 0):
         count = count + 1
         break
 if (count == 0 and Num != 1):
     print(" %d is a Prime Number" %Num)
 else:
     print(" %d is not a Prime Number" %Num)

Output:

Please Enter any Number:  50  
50 is not a Prime Number 

Example 2: Python Program To Print Numbers From 1 to N Using For Loop

# Python Program to print n prime number using for loop

  
Number = int(input(" Please Enter any Number: "))

 
print("Prime numbers between", 1, "and", Number, "are:")

 
for num in range(1, Number + 1):
   # all prime numbers are greater than 1
   if num > 1:
       for i in range(2, num):
           if (num % i) == 0:
               break
       else:
           print(num)

Output:

Please Enter any Number:  20 
Prime numbers between 1 and 20 are: 
2 3 5 7 11 13 17 19 

Example 3: Python Program To Print Numbers From 1 to N Using While Loop

# Python Program to print Prime Numbers from 1 to N

  
max = int(input(" Please Enter Any Number: "))

 
Number = 1

 
print("Prime numbers between", 1, "and", max, "are:")

 
while(Number <= max):
    count = 0
    i = 2

     
    while(i <= Number//2):
        if(Number % i == 0):
            count = count + 1
            break
        i = i + 1

 
    if (count == 0 and Number != 1):
        print(" %d" %Number, end = '  ')
    Number = Number  + 1

Output:

Please Enter Any Number:  10 
Prime numbers between 1 and 10 are:  
2   3   5   7 

Example 4: Python program to find sum of all prime numbers between 1 to n

# Python Program to print n prime number using for loop

  
max = int(input("Find sum of prime numbers upto : "))

 
sum = 0

 
for num in range(2, max + 1):

 
    i = 2

     
    for i in range(2, num):
        if (int(num % i) == 0):
            i = num
            break;

 
    #If the number is prime then add it.
    if i is not num:
        sum += num

 
print("\nSum of all prime numbers upto", max, ":", sum)

Output:

Find sum of prime numbers upto :  25 
Sum of all prime numbers upto 25 : 98