替换字符串中的变量？

text = "Hello, {name}!"
name = "John"
result = text.format(name=name)
print(result)  # 输出：Hello, John!

let text = "Hello, {name}!";
let name = "John";
let result = text.replace("{name}", name);
console.log(result);  // 输出：Hello, John!

String text = "Hello, %s!";
String name = "John";
String result = String.format(text, name);
System.out.println(result);  // 输出：Hello, John!

$text = "Hello, {name}!";
$name = "John";
$result = str_replace("{name}", $name, $text);
echo $result;  // 输出：Hello, John!