python怎么在for循环中使用break和continue_python循环控制break与continue用法

break

continue

break

continue

break

continue

for i in range(10):
    if i == 3:
        break  # 当i等于3时，终止循环
    print(i)  # 输出 0, 1, 2

for i in range(5):
    if i == 2:
        continue  # 当i等于2时，跳过本次循环的剩余部分
    print(i)  # 输出 0, 1, 3, 4

break

continue

break

outer_loop = True
for i in range(5):
    for j in range(5):
        if j == 3:
            outer_loop = False
            break  # 结束内部循环
        print(i, j)
    if not outer_loop:
        break  # 结束外部循环

def find_something():
    for i in range(5):
        for j in range(5):
            if j == 3:
                return  # 结束整个函数，相当于结束所有循环
            print(i, j)

find_something()

try...except...finally

break

continue

finally

finally

for i in range(3):
    try:
        if i == 1:
            raise ValueError("Something went wrong")
        print(f"Iteration {i}")
    except ValueError as e:
        print(f"Caught an error: {e}")
        break  # 结束循环
    finally:
        print("Finally block executed")

i

ValueError

except

break

finally

break

finally

break

continue

continue

# 不好的做法：
for i in range(10):
    if i % 2 == 0:
        continue
    print(i)

# 更好的做法：
for i in range(1, 10, 2):  # 直接从奇数开始循环
    print(i)

break