Question

所以我编写了这段代码，以便可以使用List并使用For循环来计算主题的平均成绩，但是我想知道是否还有一种方法可以使用While循环来进行相同的处理。如果可以，怎么办？

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))

非常感谢！

Answer 1

没有任何理由，我能说的最好的就是模拟一个带有while循环的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理解方式。

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，直到其为空：

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))

或遍历索引：

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

我如何正确地将此代码转换为while循环一？

2 个答案: