相同循环后的结果相同

Question

我正在向我的朋友学习Python。我有一个while循环的问题

我的问题是：为什么第一个print的缩进会改变结果

1）第一回路。正确：

import random


playerhp = 300
enemyatkl = 60
enemyatkh = 80


while playerhp > 0:
    dmg = random.randrange(enemyatkl, enemyatkh)
    playerhp = playerhp - dmg


    if playerhp <= 10:
        playerhp = 10

    #THIS ONE
    print("Enemy strikes for: ", dmg, ". And your heath is: ", playerhp)


    if playerhp == 10:
        print("You have low health. You've been teleported")

        break

Results:

Enemy strikes for: 68 . And your heath is: 232

Enemy strikes for: 66 . And your heath is: 166

Enemy strikes for: 78 . And your heath is: 88

Enemy strikes for: 67 . And your heath is: 30

You have low health. You've been teleported

2）第二回路。错误的print

import random


playerhp = 300
enemyatkl = 60
enemyatkh = 80


while playerhp > 0:
    dmg = random.randrange(enemyatkl, enemyatkh)
    playerhp = playerhp - dmg


    if playerhp <= 10:
        playerhp = 10

        #THIS ONE
        print("Enemy strikes for: ", dmg, ". And your heath is: ", playerhp)


    if playerhp == 10:
        print("You have low health. You've been teleported")

        break

Results:

Enemy strikes for: 71 . And your heath is: 10

You have low health. You've been teleported.

结果不同。为什么会这样？我知道压痕起着至关重要的作用，但我不能完全理解原因。 先谢谢你

Answer 1

在python中，没有{}花括号来标识代码块，当您更改缩进时，您会将代码移到内部或外部块

所以

if playerhp <= 10:
    playerhp = 10
    print("Enemy strikes for: ", dmg, ". And your heath is: ", playerhp)

以及

if playerhp <= 10:
    playerhp = 10
print("Enemy strikes for: ", dmg, ". And your heath is: ", playerhp)

可以看作是

if (playerhp>=10){
   playerhp=10;
   print ...
}

以及

if (playerhp>=10){
   playerhp=10; 
}
print ...