print("Hello World");
Name = input('請(qǐng)輸入您的姓名：');
print(Name);
D:\工作空間\Python\venv\Scripts\python.exe D:/工作空間/Python/main.py
Hello World
請(qǐng)輸入您的姓名：Alice
Alice
進(jìn)程已結(jié)束,退出代碼0

print("-------------輸出語句-------------");
message="Hello Python world";
print(message);
print("-------------首字母大寫-------------");
name="ada lovelace";
print(name.title());
print("-------------大小寫-------------");
print(name.upper());
print(name.lower());
print("-------------拼接字符串-------------");
first_name = "ada"
last_name = "lovelace"
full_name = first_name + " " + last_name
print(full_name);
print("-------------添加空白-------------");
print("\tPython");
print("Languages:\nPython\nC\nJavaScript");
print("-------------刪除空白-------------");
print("Hello ".rstrip());
print("-------------運(yùn)算-------------");
print(2+3);
print(3-2);
print(2*3);
print(3/2);
print(3**2);
print(3**3);
print(10**6);
print(0.1+0.1);
print(0.2+0.2);
print("------------注釋-------------");
# 測(cè)試注釋

print("-----------------算數(shù)運(yùn)算符-----------------");
#+ 加，兩個(gè)對(duì)象相加
#- 減，得到負(fù)數(shù)或是一個(gè)數(shù)減去另一個(gè)數(shù)
#* 乘，兩個(gè)數(shù)相乘或是返回一個(gè)被重復(fù)若干次的字符串
#x/y 除，x 除以 y
#% 取模，返回除法的余數(shù)
#// 取整除，返回商的整數(shù)部分
#x**y 冪
print(12+13);
print(12-13);
print(12*13);
print(12/13);
print(12/13);
print(12%13);
print(12//13);
print(12**13);
print("-----------------比較運(yùn)算符-----------------");
#== 等于，比較對(duì)象是否相等 （a == b）返回 False
#!= 不等于，比較兩個(gè)對(duì)象是否不相等 （a != b）返回 True
#<> 不等于，比較兩個(gè)對(duì)象是否不相等 （a <> b）返回 True。這個(gè)運(yùn)算符類似 !=
#x > y 大于，返回 x 是否大于 y （a > b）返回 False
#x < y小于，返回 x 是否小于 y。所有比較運(yùn)算符返回 1表示真，返回 0 表示假。這分別與特殊的變量 True 和 False 等價(jià)。注意這些變量名的大小寫（a < b）返回 True
#x >= y 大于等于，返回 x 是否大于等于 y （a >= b）返回 False
#x <= y 小于等于，返回 x 是否小于等于 y （a <= b）返回 True
print(12>13);
print(12>=13);
print(12<13);
print(12<=13);
print(12!=13);
print(12==13);
print("-----------------賦值運(yùn)算符-----------------");
#= 簡(jiǎn)單的賦值運(yùn)算符 c = a + b 將 a + b 的運(yùn)算結(jié)果賦值為 c
#+= 加法賦值運(yùn)算符 c += a 等效于 c = c + a
#-= 減法賦值運(yùn)算符 c-= a 等效于 c = c-a
#*= 乘法賦值運(yùn)算符 c *= a 等效于 c = c * a
#/= 除法賦值運(yùn)算符 c /= a 等效于 c = c / a
#%= 取模賦值運(yùn)算符 c %= a 等效于 c = c % a
#**= 冪賦值運(yùn)算符 c **= a 等效于 c = c ** a
#//= 取整除賦值運(yùn)算符 c //= a 等效于 c = c // a
a=21;
b=10;
c=0;
c+=a;
print(c);
c*=b;
print(c);
c/=a;
print(c);
c-=b;
print(c);
c=2;
c%=a;
print(c);
c**=a;
print(c);
c//=a;
print(c);
print("-----------------位運(yùn)算符-----------------");
#& 按位與運(yùn)算符 （a & b）輸出結(jié)果 12，二進(jìn)制解釋：0000 1100
#| 按位或運(yùn)算符 （a | b）輸出結(jié)果 61，二進(jìn)制解釋：0011 1101
#^ 按位異或運(yùn)算符 （a ^ b）輸出結(jié)果 49，二進(jìn)制解釋：0011 0001
#～ 按位取反運(yùn)算符
#（～a）輸出結(jié)果?61，二進(jìn)制解釋：1100 0011，
#在一個(gè)有符號(hào)二進(jìn)制數(shù)的補(bǔ)碼形式
#<< 左移動(dòng)運(yùn)算符 a << 2 輸出結(jié)果 240，二進(jìn)制解釋：1111 0000
#>> 右移動(dòng)運(yùn)算符 a >> 2 輸出結(jié)果 15，二進(jìn)制解釋：0000 1111
a=60;
b=13;
c=0;
c=a&b;
print(c);
c=a|b;
print(c);
c=a^b;
print(c);
c=~a;
print(c);
c=a<<2;
print(c);
c=a>>2;
print(c);
print("-----------------邏輯運(yùn)算符-----------------");
#x and y 布爾“與”，如果 x 為 False，x and y 返回 False，否則它返回 y 的計(jì)算值
#x or y 布爾“或”，如果 x 是 True，它返回 True，否則它返回 y 的計(jì)算值
#x not y 布爾“非”，如果 x 為 True，返回 False。如果 x 為 False，它返回 True
a=10;
b=20;
print(a and b);
a=0;
print(a and b);

print("-------------檢查是否相等-------------");
car='bmw';
print(car=='bmw');
print(car=='audi');
print(car=='BMW');
print(car.upper()=='BMW');
age=18;
print(age==18);
print(age>=18);
print(age<=18);
print(age>18);
print(age<18);
age_0 = 22;
age_1 = 18;
print(age_0 >= 21 and age_1 >= 21);
print(age_0 >= 21 or age_1 >= 21);
print("-------------if語句-------------");
age = 19
if age >= 18:
    print("You are old enough to vote!");
    
    age=17
    if age>=18:
        print("You are old enough to vote!");
    else:
        print("Sorry you are too young");
        age = 12
        if age < 4:
            print("Your admission cost is $0.")
        elif age < 18:
            print("Your admission cost is $5.")
        else:
            print("Your admission cost is $10.")
            age = 12
            if age < 4:
                price = 0
            elif age < 18:
                price = 5
            elif age < 65:
                price = 10
            elif age >= 65:
                price = 5
print("Your admission cost is $" + str(price) + ".")
-------------檢查是否相等-------------
True
False
False
True
True
True
True
False
False
False
True
-------------if語句-------------
You are old enough to vote!
Sorry you are too young
Your admission cost is $5.
Your admission cost is $5.
Process finished with exit code 0

print("-------------函數(shù)input()的工作原理-------------");
message = input("Tell me something, and I will repeat it back to you: ")
print(message)
print("-------------編寫清晰的程序-------------");
name=input("Please enter your name:");
print("Hello,"+name+"!");
print("-------------求模運(yùn)算符-------------");
print(4%3);
print("-------------while循環(huán)-------------");
current_number = 1
while current_number <= 5:
    print(current_number)
    current_number += 1
print("-------------讓用戶選擇何時(shí)退出-------------");
prompt = "\nTell me something, and I will repeat it back to you:"
prompt += "\nEnter 'quit' to end the program. "
message = ""
while message != 'quit':
    message = input(prompt)
    print(message)
print("-------------break語句-------------");
prompt = "\nPlease enter the name of a city you have visited:"
prompt += "\n(Enter 'quit' when you are finished.) "
while True:
    city = input(prompt)
    if city == 'quit':
        break
    else:
        print("I'd love to go to " + city.title() + "!")
-------------函數(shù)input()的工作原理-------------
Tell me something, and I will repeat it back to you: Hello World
Hello World
-------------編寫清晰的程序-------------
Please enter your name:Alice
Hello,Alice!
-------------求模運(yùn)算符-------------
1
-------------while循環(huán)-------------
1
2
3
4
5
-------------讓用戶選擇何時(shí)退出-------------

Tell me something, and I will repeat it back to you:
Enter 'quit' to end the program. Hello World
Hello World

Tell me something, and I will repeat it back to you:
Enter 'quit' to end the program. quit
quit
-------------break語句-------------

Please enter the name of a city you have visited:
(Enter 'quit' when you are finished.) ShangHai
I'd love to go to Shanghai!

Please enter the name of a city you have visited:
(Enter 'quit' when you are finished.) quit

Process finished with exit code 0

print("-------------字符串操作-------------");
#coding=utf-8
str = 'Hello World!'
print(str) # 輸出完整字符串
print(str[0]) # 輸出字符串中的第一個(gè)字符
print(str[2:5]) # 輸出字符串中第三個(gè)至第五個(gè)之間的字符串
print(str[2:]) # 輸出從第三個(gè)字符開始的字符串
print(str * 2) # 輸出字符串兩次
print(str + "TEST") # 輸出連接的字符串
print("-------------格式化輸出-------------");
x="歡迎您，%s，當(dāng)前第%d 次訪問! "
y=x%("小明",1)
#y=("歡迎您，%s，當(dāng)前第%d 次訪問! "%("小明",1))，以上兩行可以合并為這一行。
print(y)
print("-------------三引號(hào)-------------");
hi = '''hi
there'''
print(hi) # str()
D:\工作空間\Python\venv\Scripts\python.exe D:/工作空間/Python/main.py
-------------字符串操作-------------
Hello World!
H
llo
llo World!
Hello World!Hello World!
Hello World!TEST
-------------格式化輸出-------------
歡迎您，小明，當(dāng)前第1 次訪問! 
-------------三引號(hào)-------------
hi
there

進(jìn)程已結(jié)束,退出代碼0