console 命令行工具 X clear

> -321

console

const x = -123
const fn = (x) => {
    let res = parseInt(x.toString().split('').reverse().join(''))
    if(x < 0){
        res = -res 
    }
    return res > 2147483647 || res < -2147483648 ? 0 : res
}
console.log(fn(x))