I need help doing a do-while loop in this code.

It work fine but I need to add a do-while to prove the information please

package paint1;

import java.util.Scanner;

public class Paint1 {

public static void main(String[] args) {

Scanner scnr = new Scanner(System.in);

double wallHeight = 0.0;

double wallWidth = 0.0;

double wallArea = 0.0;

double gallonsPaintNeeded = 0.0;

final double squareFeetPerGallons = 350.0;

// Implement a do-while loop to ensure input is valid

// Prompt user to input wall's height

System.out.println("Enter wall height (feet): ");

wallHeight = scnr.nextDouble();

// Implement a do-while loop to ensure input is valid

// Prompt user to input wall's width

System.out.println("Enter wall width (feet): ");

wallWidth = scnr.nextDouble();

// Calculate and output wall area

wallArea = wallHeight * wallWidth;

System.out.printf("Wall area: %.1f square feet", wallArea);

// Calculate and output the amount of paint (in gallons) needed to paint the wall

gallonsPaintNeeded = wallArea/squareFeetPerGallons;

System.out.println("Paint needed: " + gallonsPaintNeeded + " gallons");

scnr.close();

}

}