1.基础概念

print("    ★")print("   /^\ ")print("  /^^^\ ")print(" /VVVVV\ ")print("    |")print("    |")#变数命名规则:1.只能是英文或数字或_的组合 2.开头不能是数字#清除指令:WIN (CLS) MAC(CLEAR)name = "Mr.X'max"age = 100is_male = Trueprint("有一个人名叫" + name)print(name + "100岁")print(name + "讨厌吃苦瓜")#字串换行:空白\nprint("hola,Max")print("hi, \nMax")#字串里"显示: \"print("Merry\" X'max")#函式/全部字母变小写: 字串.lower()#函式/全部字母变大写: 字串.upper()phrase= "Hello, Eva"print(phrase.lower())print(phrase.upper())#函式/全部字母若为大写，反馈True，否则False: 字串.isupper()#函式/全部字母若为小写，反馈True，否则False: 字串.islower()print(phrase.isupper())print(phrase.islower())#函式可以叠加,EX:全部变大写，检视是否大写print(phrase.upper().isupper())#字串[数字]，反馈字串中第几(数字)位的字元,python从0开始计phrase = "Hi,Eva!"#字元计算  0123456print(phrase[0])print(phrase[1])print(phrase[2])print(phrase[3])print(phrase[4])print(phrase[5])print(phrase[6])#字串.index("字元")，反馈字串中字元为第几(数字)位,python从0开始计phrase = "Hi,Eva!"#字元计算  0123456print(phrase.index("E"))#字串.index("字元")，反馈字串中字元为第几(数字)位,python从0开始计,重複的会回传最前面的phrase = "Hello,Eva!"#字元计算  0123456789print(phrase.index("l"))#字串.replace("字元A","字元B")，所有字元A都会替换字元Bphrase = "Hello,Eva!"print(phrase.replace("l","L"))