In this program, we have checked if num is prime or not. Numbers less than or equal to 1 are not prime numbers. Hence, we only proceed if the num is greater than 1. We check if num is exactly divisible by any number from 2 to num - 1. If we find a factor in that range, th...
下面是经过优化的素数判断函数: defis_prime(n):ifn<=1:returnFalseifn==2:returnTrueifn%2==0:returnFalseforiinrange(3,int(n**0.5)+1,2):ifn%i==0:returnFalsereturnTrue 1. 2. 3. 4. 5. 6. 7. 8. 9. 10. 11. 结语 本文介绍了素数的定义,并使用Python编写了一个函数来判断一个数是否...
prime number python代码 primes在python 1.题目 2.代码 import os import sys # 请在此输入您的代码 def countPrimes(n): primes=[1]*n count=0 li=[] for i in range(2,n): if primes[i]: count+=1 li.append(i) for j in range(i*i,n,i): primes[j]=0 return count,li n=int(input...
The Sieve of Eratosthenes is an efficient algorithm to find all primes up to a given limit. It works by iteratively marking the multiples of each prime starting from 2. Example: Here is a Python program to print prime numbers from 1 to n. def sieve_of_eratosthenes(n): primes = [True]...
Next Prime Number - Have the program find prime numbers until the user chooses to stop asking for the next one. Find Cost of Tile to Cover W x H Floor - Calculate the total cost of tile it would take to cover a floor plan of width and height, using a cost entered by the user. ...
We # just need to swap where the key and LETTERS strings are used. charsA, charsB = charsB, charsA # Loop through each symbol in the message: for symbol in message: if symbol.upper() in charsA: # Encrypt/decrypt the symbol: symIndex = charsA.find(symbol.upper()) if symbol....
flag1=prime(k)#调用prime函数ifflag1:#如果k为素数 flag2=prime(j)#调用prime函数ifflag2:#如果k和j都是素数print(i,'=',k,'+',j)#输出结果 n+=k=k+ 结果如下。 在这里插入图片描述 三、参考 1、廖雪峰的官网 2、python官网 ...
program.' % (name, name)) publicKey, privateKey = generateKey(keySize) print() print('The public key is a %s and a %s digit number.' % (len(str(publicKey[0])), len(str(publicKey[1]))) print('Writing public key to file %s_pubkey.txt...' % (name)) fo = open('%s_pubkey...
using System;publicclassHappyProgram{publicstaticvoidMain(){ Console.WriteLine("Enter a number: ");intYourNumber=Convert.ToInt16(Console.ReadLine());if(YourNumber >10) Console.WriteLine("Your number is greater than ten");if(YourNumber <=10) Console.WriteLine("Your number is ten or smaller"...
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