Python program to print prime numbers

In this python tutorial, you will learn about the python program to print prime numbers also we will check:

• Python program to print prime numbers
• Python program to print prime or not
• Simple prime number program in python
• Python program to print prime numbers upto n
• Python program to print prime numbers from 1 to 100
• Python find prime numbers in a range
• Python program to print prime numbers using while loop
• Python program to print prime numbers using for loop
• Python program to print prime numbers from 1 to 100 using while loop
• Python program to print prime numbers from 1 to 20
• Python program for prime number using if-else
• Python program for prime number using list comprehension
• Python program for prime number in interval
• Python find the sum of prime numbers in a range
• First n prime numbers Python

Python program to print prime numbers

Let see python program to print prime numbers.

• Firstly, we will take two inputs from the user.
• for loop is used to iterate from lower to upper values
• Another for loop is used, we are dividing the input number by all the numbers in the range of 2 to number. It checks whether there are any positive divisors other than 1 and the number itself.
• The break statement is used to come out of the loop as soon we get any positive divisor then no further check is required.
• At last, it prints the number which is prime.

You may also like Check if a number is a prime Python and How to print factorial of a number in Python.

Example:

lower = int(input("Enter the lower value:"))
upper = int(input("Enter the upper value:"))
for number in range(lower,upper+1):
    if number>1:
        for i in range(2,number):
            if (number%i)==0:
                break
        else:
            print(number)

To get the output, I have used print(number). You can refer to the below screenshot for the output.

The above code, we can use to print prime numbers in Python.

Read, Python program to print pattern and How to calculate simple interest in Python?

Python program to print prime or not

Now, we will see python program to print prime or not.

• Firstly, we will take one input from the user.
• A prime number is always positive so, we will check at the beginning of the program
• Another for loop is used, we are dividing the input number by all the numbers in the range of 2 to number. It checks whether there are any positive divisors other than 1 and the number itself.
• If any divisor is found then we display that the “number is not prime number” else we display that the “number is a prime number”.
• The break statement is used to come out of the loop as soon we get any positive divisor then no further check is required.
• At last, it prints the number which is prime.

Example:

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

To get the output, I have used print(number, “is prime number”). You can refer to the below screenshot for the output.

The above code we can use to print prime or not in Python.

Read: Sum of even digits of a number in Python

Simple prime number program in python

Here, we will see simple prime number program in python.

• Firstly, we will take two inputs (low and high) from the user
• Here, we will use for loop to iterate through the given range
• Now, we will check whether the values within the given range are divisible by 1 and itself.
• The break statement is used to come out of the loop as soon we get any positive divisor then no further check is required.
• else, print the number

Example:

low = int(input("Enter the lower value:"))
high = int(input("Enter the higher value:"))
for num in range(low, high+1):
    if(num>1):
        for i in range(2,num):
            if(num%i)==0:
                break
        else:
            print(num)

To get the output, I have used print(num). You can refer to the below screenshot for the output.

Hope, you liked the simple prime number program in Python.

Python program to print prime numbers upto n

Let’s see python program to print prime numbers upto n

• Firstly, we will set the initial value with 1
• Now, we will take input from the user which is stored in variable n.
• for loop is used for dividing the input number by all the numbers in the range of 2 to number. It checks whether there are any positive divisors other than 1 and the number itself.
• If any divisor is found then we display that the “number is not prime number” else we display that the “number is a prime number”.
• The break statement is used to come out of the loop as soon we get any positive divisor then no further check is required.
• At last, it prints the number which is prime

Example:

start_val = 1
n = int(input("Enter the n number:"))
for num in range(start_val, n+1):
    if(num>1):
        for i in range(2,num):
            if(num%i)==0:
                break
        else:
            print(num)

To get the output, I have used print(num). You can refer to the below screenshot for the output.

This Python code, we can use to print prime numbers upto n in Python.

Python program to print prime numbers from 1 to 100

Now, we will see a python program to print prime numbers from 1 to 100.

• I have used for loop to iterate a loop from 1 to 100.
• Another for loop is used to check whether the number is divisible or not.
• The break statement is used to come out of the loop as soon we get any positive divisor then no further check is required.
• At last, it prints the number in the given range.

Example:

for num in range(1, 101):
    if(num>1):
        for i in range(2,num):
            if(num%i)==0:
                break
        else:
            print(num, end = '  ')

To get the output, I have used print(num, end = ‘ ‘). You can refer to the below screenshot for the output.

This Python code, we can use to print prime numbers from 1 to 100 in Python.

Python find prime numbers in a range

Now we will see python find prime numbers in a range.

• I have stored the value in the lower and upper, and we will find prime numbers in that range.
• for loop is used to iterate from lower to upper values
• Another for loop is used, we are dividing the input number by all the numbers in the range of 2 to number. It checks whether there are any positive divisors other than 1 and the number itself.
• The break statement is used to come out of the loop as soon we get any positive divisor then no further check is required.
• At last, it prints the number in the given range

Example:

lower = 100
upper = 200
print("Prime numbers between", lower, "and", upper, "are:")
for num in range(lower, upper + 1):
   if num > 1:
       for i in range(2, num):
           if (num % i) == 0:
               break
       else:
           print(num, end = " ")

To get the output, I have used print(num, end = ” “). You can refer to the below screenshot for the output.

This code we can use to find prime numbers in a range in Python.

Python program to print prime numbers using while loop

Let’s see python program to print prime numbers using while loop.

• Firstly, we will initialize num as 1
• Here, we will use a while loop to calculate the prime number
• i = 2 is used for checking the factor of the number
• We are dividing the number by all the numbers using f(num % i == 0).
• The break statement is used to come out of the loop as soon we get any positive divisor then no further check is required.
• At last print(” %d” %num, end = ‘ ‘) is used for printing the prime numbers.

Example:

num = 1
while(num <= 30):
    count = 0
    i = 2
    while(i <= num//2):
        if(num % i == 0):
            count = count + 1
            break
        i = i + 1
    if (count == 0 and num!= 1):
        print(" %d" %num, end = '  ')
    num = num + 1

To get the output, I have used print(” %d” %num, end = ‘ ‘). You can refer to the below screenshot for the output.

This is how to print prime numbers using while loop in Python.

Python program to print prime numbers using for loop

Now, we will see python program to print prime numbers using for loop.

• Firstly, I have taken two variable and the value is initialized
• I have used for loop to iterate in the given range
• Another for loop is used to check whether the number is divisible or not.
• The break statement is used to come out of the loop as soon we get any positive divisor then no further check is required.
• At last, it prints the prime number

Example:

l = 20
h = 50
for num in range(l, h+1):
    if(num>1):
        for i in range(2,num):
            if(num%i)==0:
                break
        else:
            print(num, end = '  ')

To get the output, I have used print(num, end = ” “). You can refer to the below screenshot for the output.

This is how to print prime numbers using for loop in Python.

Python program to print prime numbers from 1 to 100 using while loop

Now, we will see python program to print prime numbers from 1 to 100 using while loop

• Firstly, we will initialize num as 1
• Here, we will use a while loop to calculate the prime number from 1 to 100
• i = 2 is used for checking the factor of the number
• We are dividing the number by all the numbers using f(num % i == 0).
• The break statement is used to come out of the loop as soon we get any positive divisor then no further check is required.
• At last print(” %d” %num, end = ‘ ‘) is used for printing the prime numbers.

Example:

num = 1
while(num <= 100):
    count = 0
    i = 2
    while(i <= num//2):
        if(num % i == 0):
            count = count + 1
            break
        i = i + 1
    if (count == 0 and num!= 1):
        print(" %d" %num, end = '  ')
    num = num + 1

To get the output, I have used print(” %d” %num, end = ‘ ‘). You can refer to the below screenshot for the output.

This code, we can use to print prime numbers from 1 to 100 using while loop in Python.

Python program to print prime numbers from 1 to 20

Here, we will see python program to print prime numbers from 1 to 20.

• Firstly, I have taken two variables start and end with the value initialized.
• for loop is used to iterate the value from start to end
• Another for loop is used to check whether the number is divisible or not.
• The break statement is used to come out of the loop as soon we get any positive divisor then no further check is required.
• At last, it prints the prime number from 1 to 20

Example:

start = 1
end = 20
for num in range(start, end+1): 
  if num>1: 
    for j in range(2,num): 
        if(num % j==0): 
            break
    else: 
        print(num, end=" ") 

To get the output, I have used print(num, end = ” “). You can refer to the below screenshot for the output.

This Python code, we can use to print prime numbers from 1 to 20 in Python.

Python program for prime number using if-else

Let see python program for prime number using if-else

• Firstly, I have initialized the two variable
• I have used for loop to iterate in the given range
• Another for loop is used to check whether the number is divisible or not.
• if condition checks whether the number is equal to zero or not
• The break statement is used to come out of the loop as soon we get any positive divisor then no further check is required.
• else print the prime number

Example:

S = 50
E = 80
for num in range(S, E+1): 
  if num>1: 
    for i in range(2,num): 
        if(num % i==0): 
            break
    else: 
        print(num, end=" ") 

To get the output, I have used print(num, end = ” “). You can refer to the below screenshot for the output.

This is how check a prime number in if-else in Python.

Python program for prime number using list comprehension

Let see python program for prime number using list comprehension.

In this example, the list comprehension is used to find the prime numbers in the range 2 to n+1 where n=50 is initialized at the starting.

Example:

n = 50
prime = [i for i in range(2, n + 1) if all(i%j != 0 for j in range(2, int(i ** 0.5) + 1))]
print(prime)

To get the output, I have used print(prime). You can refer to the below screenshot for the output.

Python program for prime number in interval

Now, we will see python program for prime number in interval

• I have stored the value in the start and end, and we will find prime numbers in that range.
• for loop is used to iterate from start to end values
• Another for loop is used, we are dividing the input number by all the numbers in the range of 2 to number. It checks whether there are any positive divisors other than 1 and the number itself.
• The break statement is used to come out of the loop as soon we get any positive divisor then no further check is required.
• At last, it prints the number in the given range

Example:

start = 500
end = 600
print("Prime numbers in interval", start, "and", end, "are:")
for num in range(start, end + 1):
   if num > 1:
       for i in range(2, num):
           if (num % i) == 0:
               break
       else:
           print(num, end=" ")

To get the output, I have used print(num, end = ” “). You can refer to the below screenshot for the output.

This is how to get prime number in interval in Python.

Python find sum of prime numbers in a range

Lets see how to find the sum of prime numbers in a range.

• Firstly, we will take one input from the user.
• Then we will define a function and the loop is used to iterate from the given range.
• Another for loop is used, we are dividing the input number by all the numbers in the range of 2 to maxint. It checks whether there are any positive divisors other than 1 and the number itself.
• The break statement is used to come out of the loop as soon we get any positive divisor then no further check is required.
• The generator function yield a is used in the loop for iterable to call the sum.
• At last, the print will return the sum of prime numbers in the range.

Example:

num = int(input("Enter a number: "))
def sum_range(num):
    for a in range(2, num + 1):
        maxint = int(a **.5) + 1 
        for i in range(2, maxint):
            if a % i == 0:
                break
        else:
            yield a
print(sum(sum_range(num)))

To get the output, I have used print(sum(sum_range(num))). You can refer to the below screenshot for the output.

This is how to find sum of prime numbers in a range in Python.

First n prime numbers Python

Here, we will see first n prime numbers Python.

• Firstly, we will take one input from the user.
• for n in range(2,num) is used to iterate in the given range.
• Another for loop is used, we are dividing the input number by all the numbers in the range of 2 to n. It checks whether there are any positive divisors other than 1 and the number itself.
• The break statement is used to come out of the loop as soon we get any positive divisor then no further check is required.
• At last, it prints the number which is prime.

Example:

num=int(input("Enter range:"))
print("Prime numbers:", end=' ')
for n in range(2,num):
    for i in range(2,n):
        if(n%i==0):
            break
    else:
        print(n,end=' ') 

To get the output, I have used print(n, end = ‘ ‘). You can refer to the below screenshot for the output.

This is how to find first n prime numbers in Python.

You may like the following Python tutorials:

• Python format number with commas
• Python generate random number and string
• Python square a number
• Python program to print element in an array
• Python string formatting with examples

In this Python tutorial, we have learned about the Python program to print prime numbers. Also, we covered these below topics:

• Python program to print prime numbers
• Python program to print prime or not
• Simple prime number program in python
• Python program to print prime numbers upto n
• Python program to print prime numbers from 1 to 100
• Python find prime numbers in a range
• Python program to print prime numbers using while loop
• Python program to print prime numbers using for loop
• Python program to print prime numbers from 1 to 100 using while loop
• Python program to print prime numbers from 1 to 20
• Python program for prime number using if-else
• Python program for prime number using list comprehension
• Python program for prime number in interval
• Python find the sum of prime numbers in a range
• First n prime numbers Python