To solve errors in code

) 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

package prog;
public class GFG {
	
	public static void main(String[] args)
	    /* Iterative function to reverse
	    digits of num*/
	    static int reversDigits(int num)
	    {
	        int rev_num = 0;
	        while(num > 0)
	        {
	            rev_num = rev_num * 10 + num % 10;
	            num = num / 10;
	        }
	        return rev_num;
	    }
	     
	

}