给定列表来自用户输入，我们可以使用列表理解来解决它是否是质数

Question

num = int (input('Enter the Number : '))
if (num <=1):
  print (num,'is not a prime number')
else:
  for i in range (2,num):
      if (num%i)==0:
       print (num,'is not a prime number')
       break
  else:
    print (num,'is prime number')

Answer 1

[且仅当索引i是num的因数时，您才能创建一个布尔值列表，它们为True。然后，当且仅当num是质数时，该列表的总和为零：

num = int(input('Enter the number: '))

if (num <= 1):
    print (num, 'is not a prime number.')
else:
    divisors = [(num % i) == 0 for i in range(2, num)]
    if sum(divisors) > 0:
        print (num, 'is not a prime number.')
    else:
        print (num, 'is a prime number.')