以较少的混合将参数附加到变量

const name = 'John';
const age = 25;

const 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)

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

const sum = (a, b) => a + b;

const result = sum(2, 3);
assert.strictEqual(result, 5, 'The sum is incorrect.');

const mysql = require('mysql');

const connection = mysql.createConnection({
  host: 'localhost',
  user: 'root',
  password: 'password',
  database: 'mydb'
});

const name = 'John';
const age = 25;

const sql = 'INSERT INTO users (name, age) VALUES (?, ?)';
connection.query(sql, [name, age], (error, results) => {
  if (error) throw error;
  console.log('User inserted successfully.');
});

# 配置文件方式
# /etc/myapp.conf
name=John
age=25

# 命令行参数方式
$ node myapp.js --name John --age 25