A positive integer greater than 1 which has no other factors except 1 and the number itself is called a prime number. 2, 3, 5, 7 etc. are prime numbers as they do not have any other factors. But 6 is not prime (it is composite) since,
2 x 3 = 6. We ask the user for a range and display all the primes in that interval.
# Python program to ask the user for a range and display all the prime numbers in that interval
# take input from the user
lower = int(input("Enter lower range: "))
upper = int(input("Enter upper range: "))
for num in range(lower,upper + 1):
# prime numbers are greater than 1
if num > 1:
for i in range(2,num):
if (num % i) == 0:
Enter lower range: 900
Enter upper range: 1000
Here, we take an interval from the user and find prime numbers in that range. Visit this page to understand the code to check for prime numbers.