python 中break用法

Question

为什么在范围len(x)上迭代，那第一个值的索引是1还是0.9999捏？

Answer 1

x = [0.9,0.99,0.999,0.9999,0.999991]
for i in range(len(x)):
    if x[i]>0.999:
        print(x[i])
        break

out:
0.9999