Python Prime Number Check
Python3 ExamplesA natural number greater than 1, apart from 1 and itself, cannot be divided by other natural numbers (prime numbers) (2, 3, 5, 7, etc.). In other words, the number has no other factors besides 1 and itself.
test.py file:
# -*- coding: UTF-8 -*-
# Filename : test.py
# author by : www.example.com
# Python program to detect whether the number entered by the user is a prime number
# User enters a number
num = int(input("Please enter a number:"))
# Prime numbers are greater than 1
if num > 1:
# Check for factors
for i in range(2,num):
if (num % i) == 0:
print(num,"is not a prime number")
print(i,"multiplied by",num//i,"Yes",num)
break
else:
print(num,"is a prime number")
# If the input number is less than or equal to 1, it is not a prime number
else:
print(num,"is not a prime number")
The output after executing the above code is:
$ python3 test.py 请输入一个数字: 1 1 不是质数 $ python3 test.py 请输入一个数字: 4 4 不是质数 2 乘于 2 是 4 $ python3 test.py 请输入一个数字: 5 5 是质数Other Extensions