如何将变量添加到现有文本中？

var name = "John";
var age = 25;
var message = "My name is " + name + " and I am " + age + " years old.";
console.log(message);

name = "John"
age = 25
message = "My name is " + name + " and I am " + str(age) + " years old."
print(message)

String name = "John";
int age = 25;
String message = "My name is " + name + " and I am " + age + " years old.";
System.out.println(message);

var name = "John";
var age = 25;
var message = `My name is ${name} and I am ${age} years old.`;
console.log(message);

name = "John"
age = 25
message = "My name is {} and I am {} years old.".format(name, age)
print(message)

String name = "John";
int age = 25;
String message = String.format("My name is %s and I am %d years old.", name, age);
System.out.println(message);