python的循环

python 的循环

1. for循环

# 遍历列表
my_list = [1, 2, 3, 4, 5]
for i in my_list:
    print(i)

# 遍历字符串
my_string = "Hello, World!"
for letter in my_string:
    print(letter)

2. while循环

i = 0
while i < 5:
    print(i)
    i += 1

3. break和continue语句

# 使用break和continue语句  
for i in range(10):  
    if i == 5:  
        break  # 当i等于5时，终止循环  
    if i % 2 == 0:  
        continue  # 当i是偶数时，跳过循环的剩余部分，进入下一次循环  
    print(i)

4. python的内置函数，返回一个枚举函数用于遍历，并将索引和值赋值给i和value

my_list = ['apple', 'banana', 'orange']
for i, value in enumerate(my_list, start=10):
    print(f"Index: {i}, Value: {value}")