//字符串转换 string str = "my name is qq, hello world!"; Console.WriteLine("大写:"+ str.ToUpper()); //大写:变量名.ToUpper() Console.WriteLine("小写:" + str.ToLower()); //小写:变量名.ToLower() //字符转换 char myChar = 'q'; Console.WriteLine("大写:"+ char.ToUpper(myChar)); //大写:char.ToUpper(变量名) Console.WriteLine("小写:" + char.ToLower(myChar)); //小写:char.ToLower(变量名) Console.ReadKey();
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