[英]How is it possible to use a while loop to print even numbers 2 through 100?
I am a beginner and I am stuck on this problem, "Write a python code that uses a while loop to print even numbers from 2 through 100. Hint ConsecutiveEven differ by 2."我是一个初学者,我被这个问题困住了,“编写一个使用 while 循环打印从 2 到 100 的偶数的 python 代码。提示 ConsecutiveEven 相差 2。”
Here is what I came up with so far:这是我到目前为止的想法:
while num in range(22,101,2):
print(num)
Use either for
with range()
, or use while
and explicitly increment the number.使用
for
with range()
,或使用while
并显式增加数字。 For example:例如:
>>> i = 2
>>> while i <=10: # Using while
... print(i)
... i += 2
...
2
4
6
8
10
>>> for i in range(2, 11, 2): # Using for
... print(i)
...
2
4
6
8
10
This is what I'd try:这就是我要尝试的:
i=2
while i <= 100:
if ( i % 2==0):
print (i, end=', ')
i+=1
Here is how to use the while loop下面是使用while循环的方法
while [condition]:
logic here
using while in range is incorrect.在范围内使用 while 是不正确的。
num = 0
while num <=100:
if num % 2 == 0:
print(num)
num += 1
Your code has several problems:您的代码有几个问题:
while
for a statement with for
syntax.for
语法替换while
语句。 while
takes a bool, not an iterable. while
需要一个布尔值,而不是可迭代的。range
: you will start at 22.range
值:您将从 22 开始。 With minimal changes, this should work:只需很少的更改,这应该可以工作:
for num in range(2, 101, 2):
print(num)
Note that I used 101
for the upper limit of range
because it is exclusive .请注意,我使用
101
作为range
上限,因为它是exclude 。 If I put 100
it would stop at 98
.如果我放
100
它会停在98
。
If you need to use a while
loop:如果您需要使用
while
循环:
n = 2
while n <= 100:
print (n)
n += 2
使用 for while 编写一个只显示 1 到 20 的偶数的函数。确保你的函数被称为打印机
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