如何在typescript中添加任何类型

let myVariable: any; // 添加 any 类型注解
myVariable = 10;
myVariable = "Hello";

function greet(name: string): void {
  console.log("Hello, " + name);
}

greet("John"); // 输出：Hello, John

function add(a: number, b: number): number {
  return a + b;
}

const result: number = add(5, 10);
console.log(result); // 输出：15

let myVariable = 10; // 推断为 number 类型
let myString = "Hello"; // 推断为 string 类型

function multiply(a: number, b: number) {
  return a * b; // 推断返回值类型为 number
}