将常量字符*转换为小写字符*

const constant = "*";
const lowercase = constant.toLowerCase();
console.log(lowercase); // 输出 "*"

constant = "*"
lowercase = constant.lower()
print(lowercase)  # 输出 "*"

String constant = "*";
String lowercase = constant.toLowerCase();
System.out.println(lowercase); // 输出 "*"

string constant = "*";
string lowercase = constant.ToLower();
Console.WriteLine(lowercase); // 输出 "*"