如何正确将此代码转换为 while 循环一？

Question

所以我编写了这段代码，这样我就可以使用 List 并使用 For 循环来计算一个主题的平均成绩，但我想知道是否还有一种方法可以使用 While 循环来制作相同的过程。 如果是这样，怎么做？

mathavg=[[3.5],[3.7],[4],[4.2],[3.6]]
m = 0
for grade1 in mathavg:
    m += sum(grade1)

print("The average score for the subject of Mathematics is: ",m / len(mathavg))

太感谢了！

Answer 1

没有任何理由，我能说的最好的就是用一个while循环模拟一个for循环。

mathavg=[[3.5],[3.7],[4],[4.2],[3.6]]
m = 0
i = 0
while i < len(mathavg):
    m += sum(mathavg[i])
    i += 1

尽管您可以使用任何一种方式理解。

m = sum([sum(i) for i in mathavg])

Answer 2

您可以遍历mathavg ，在每次迭代中删除项目，直到它为空：

mathavg=[[3.5],[3.7],[4],[4.2],[3.6]]
m = 0
while mathavg:
    grade = mathavg.pop()
    m += sum(grade1)

print("The average score for the subject of Mathematics is: ",m / len(mathavg))

或迭代索引：

mathavg=[[3.5],[3.7],[4],[4.2],[3.6]]
m = 0
i = 0
while i < len(mathavg):
    m += sum(mathavg[i])
    i += 1