let numbers = [1, 2, 3, 4, 5];

numbers.splice(1,2);

console.log(numbers):

let a: string ='100'

let b:number=100

if (a == b){

    console.log('a == b is true')

} else {

    console.log('a == b is false’)

function fun1(): boolean {

    console.log('this is func1')

    return true

}

function fun2(): boolean {

    console.log('this is func2')

return false

}

if (fun1() ||  fun2()){

    console.log('if表达式成立')

}else{

    console.log('if表达式不成立")

}

let str1: string ='23.5

let num = Number(str1)

console.log(num)

async function fetchNumbers(): Promise<number[]> {

    return [1, 2, 3];

}

fetchNumbers().then(numbers => console.log(numbers));