打印所有不能被 2 或 3 整除的整数的Python程序

我们可以输入一组整数，并通过检查整数的余数与2和3来检查该范围内以1开头的哪些整数不能被2或3整除。

例子：

Input: 10
Output: Numbers not divisible by 2 and 3
1
5
7

方法一：我们用and子句检查这个数是否不能被2和3整除，然后输出这个数。

Python3

# input the maximum number to
# which you want to send
max_num = 20
  
# starting numbers from 0
n = 1
  
# run until it reaches maximum number
print("Numbers not divisible by 2 and 3")
while n <= max_num:
      
    # check if number is divisible by 2 and 3
    if n % 2 != 0 and n % 3 != 0:
        print(n)
      
    # incrementing the counter
    n = n+1

输出：

Numbers not divisible by 2 and 3
1
5
7
11
13
17
19

方法二：我们从 1 开始遍历奇数，因为偶数可以被 2 整除。因此，我们将 for 循环增加 2，只遍历奇数并检查其中一个不能被 3 整除。这种方法是比前一个更好，因为它只迭代指定范围内元素数量的一半。

以下Python代码说明了这一点：

蟒蛇3

# input the maximum number to
# which you want to send
max_num = 40
print("Numbers not divisible by 2 or 3 : ")
  
# run until it reaches maximum number
# we increment the loop by +2 each time,
# since odd numbers are not divisible by 2
for i in range(1, max_num, 2):
      
    # check if number is not divisible by  3
    if i % 3 != 0:
        print(i)

输出：

Numbers not divisible by 2 or 3 : 
1
5
7
11
13
17
19
23
25
29
31
35
37