A prime number, also known as a prime number, is a number that no longer has any other factor than 1 and itself in a natural number greater than 1.
Python, as a concise and easy-to-understand programming language, is well suited for this functionality. Enjoy the New Year
This article will show how to use Python to determine whether a number is prime, and output the result gracefully.
The basic concept of prime numbers.
A prime number is a natural number that has only two positive factors (1 and itself) that is infinitely distributed among natural numbers greater than 1.
For example, etc. are prime numbers.
The principle of the algorithm for judging prime numbers.
A common way to tell if a number n is prime is trial division.
The basic idea of trial division is:
Starting from 2 to the square root of n (including the square root), try to divide n with each number in turn, if n is divisible by any of these numbers, then n is not prime; Otherwise, n is prime.
Use python to determine prime numbers and output them.
Next, we'll use a python example to show how to tell if a number is prime, and output the result elegantly.
Then, we define a function that outputs all the prime numbers in the specified range. ** Below:
Verify. Let's verify it, ** as follows:
start = int(input("Please enter the starting number (greater than 1):")) end = int(input("Please enter the end number:")) print("In", start, "to", end, "The prime numbers between are:") print_primes(start, end)
In the above **, the is prime function is used to determine whether a number is prime, and the print prime function is used to output all prime numbers within the specified range.
In the test, we get the start and end digits of the user's input via the input function, and then call the print primes function to output all the prime numbers in the range.
After running the test, you can enter a starting number and an end number, and the program will output all the prime numbers between the two numbers.
Summary. This article introduces the basic concepts of prime numbers, the principles of algorithms for judging prime numbers, and provides Python examples, hoping to help readers master the methods of judging prime numbers and apply them flexibly in practical programming.
As a concise and easy-to-understand programming language, Python is very suitable for determining prime numbers. Hopefully, this article will provide you with valuable reference and assistance.