Reverse Integer

Given a signed 32-bit integer x, return x with its digits reversed. If reversing x causes the value to go outside the signed 32-bit integer range [-2³¹, 2³¹ - 1], then return 0.

Assume the environment does not allow you to store 64-bit integers (signed or unsigned).

Example 1:

Input: x = 123
Output: 321

Example 2:

Input: x = -123
Output: -321

Example 3:

Input: x = 120
Output: 21

Example 4:

Input: x = 0
Output: 0

Constraints:

• -2³¹ <= x <= 2³¹ - 1

solution:

/**
 * @param {number} x
 * @return {number}
 */
var reverse = function(x) {
    let MIN = 1<<31 ;
    let MAX = (1<<30)*2-1
    let negative = x<0;
    let result = 0;
    while (x!=0)
    {
        let a = x % 10 ;
        x  = parseInt(x/10);
        result = result * 10 + a;
        if(result>MAX || result<MIN){
           result = 0;
           break;
        }
    }
    return result;
};