What are the common flow control structures in Python?

There are four common flow control structures in Python, namely sequential structure, conditional structure, loop structure and jump structure. The following will introduce them one by one and provide corresponding code examples.

1. Sequential structure:
   Sequential structure is a structure in which the program is executed in a predetermined order from top to bottom, without specific keywords or syntax.
   Sample code:

print("这是顺序结构示例1")
print("这是顺序结构示例2")
print("这是顺序结构示例3")

2. Conditional structure:
   The conditional structure selects different code execution paths according to the true or false condition, using the if, elif and else keywords.
   Sample code:

x = int(input("请输入一个整数: "))
if x > 0:
    print("输入的整数为正数")
elif x < 0:
    print("输入的整数为负数")
else:
    print("输入的整数为零")

3. Loop structure:
   The loop structure is used to repeatedly execute a piece of code. There are two forms: for loop and while loop.
   Sample code:

# for循环示例
fruits = ["apple", "banana", "cherry"]
for fruit in fruits:
    print(fruit)

# while循环示例
count = 1
while count <= 5:
    print("当前数字为:", count)
    count += 1

4. Jump structure:
   Jump structure is used to jump to a specified location to continue execution during program execution. There are two forms: break and continue.
   Sample code:

# break示例
fruits = ["apple", "banana", "cherry"]
for fruit in fruits:
    if fruit == "banana":
        break
    print(fruit)

# continue示例
for i in range(1, 6):
    if i == 3:
        continue
    print("当前数字为:", i)

The above is an introduction and code examples of common process control structures in Python. For different scenarios, we can flexibly use these structures to achieve the functions we need.

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