message = "hello world" print(message) message = "Let's go" print(message) # title()以首字母大写显示每个单词 name = "zhou yu ting" print(name.title()) name = "ZHOU YU TING" print(name.title()) name = "Zhou Yu Ting" print(name.upper()) print(name.lower()) # f字符串，f是format的简写 first_name = "zhou" last_name = "Yuting" full_name = f"My name is {first_name.title()} {last_name}" print(full_name) print(f"\t{full_name}") print(f"\t{first_name}\n\t{last_name}") # lstrip清除左边空格 rstrip清除右边空格 favorite_language = " python " print(f"{favorite_language}{message}") print(f"{favorite_language.lstrip()}{message}") print(f"{favorite_language.rstrip()}{message}") # 数 print(f"1+1={1+1}") print(f"2-1={2-1}") print(f"2*3={2*3}") print(f"3/2={3/2}") print(f"1+2*3={1+2*3}") print(f"(1+2)*3={(1+2)*3}") print(f"0.1+0.1={0.1+0.1}") print(f"0.1+0.2={0.1+0.2}") print(f"0.4-0.2={0.4-0.2}") print(f"0.1*2={0.1*2}") print(f"0.4/0.2={0.4/0.2}") # 任意两个数相除，结果总是浮点数 # 只要操作数有浮点数，结果也是浮点数 print(f"4/2={4/2}") print(f"4/0.1={4/0.1}") # 书写很大的数，可用下户线将其中的数字分组，使其更清晰易读 1000可以是1_000，也可以是10_00 universe_age = 14_000_000 print(universe_age) # 同时给多个变量赋值 x, y, z = 0, 1, 2 print(y) # python没有内置的常量类型，一般使用全大写来指出某个变量视为常量 MAX_CONNECTION = 5000 # Python之禅 # import this
