If statement done correctly?

I have to move a rover on a 10x10 hypothetic board. Everything goes smoothly until I set the if statement on moveForward(and moveBackward)function when it gives me error. With the if conditions, the player should not be able to move outside of the grid because an error message should appear, in my case the msg: You cannot place the rover outside the board!

let myRover = {
   direction: 'N',
   x: 0,
   y: 0,
   travelLog: [{
       x: 0,
       y: 0
   }]
}


function turnLeft(rover) {

   console.log('turnLeft was called!');

   switch (rover.direction) {

       case 'W':
           rover.direction = 'S';
           break;

       case 'N':
           rover.direction = 'W';
           break;

       case 'S':
           rover.direction = 'E';
           break;

       case 'E':
           rover.direction = 'N';
           break;
   }
}

function turnRight(rover) {

   console.log('turnRight was called!');

   switch (rover.direction) {
       case 'N':
           rover.direction = 'E';
           break;

       case 'W':
           rover.direction = 'N';
           break;

       case 'S':
           rover.direction = 'W';
           break;

       case 'E':
           rover.direction = 'S';
           break;
   }
}

function moveForward(rover) {

   console.log('moveForward was called');

    if (rover.x >= 0 && rover.x < 9 && rover.y >= 0 && rover.y < 9) {

   switch (rover.direction) {

       case 'N':
           rover.x++;
           break;

       case 'W':
           rover.y--;
           break;

       case 'S':
           rover.x--;
           break;

       case 'E':
           rover.y++;
           break;
   }
  } else {
     console.log(''You cannot place the rover outside the board!'');
    } 

}

//print out rover position

console.log(`The rover has position: x= ${rover.x} ,  y= ${rover.y};`)

//declare a new variable in order to update and push the new position into our roverObject

let newPosition = {
   x: rover.x,
   y: rover.y
};

rover.travelLog.push(newPosition);


function moveBackward(rover) {

   console.log('moveBackward was called');

    if (rover.x >= 0 && rover.x < 9 && rover.y >= 0 && rover.y < 9) {

     switch (rover.direction) {

       case 'N':
           rover.x--;
           break;

       case 'W':
           rover.y++;
           break;

       case 'S':
           rover.x++;
           break;

       case 'E':
           rover.y--;
           break;
   }
    } else {
   console.log(''You cannot place the rover outside the board!'');
   check }

   rover.travelLog.push(newPosition);

}

//print out rover position 

console.log(`The rover has position: x= ${rover.x} ,  y= ${rover.y};`)

//create a function that receives a list of commands (what the rover should do when we give it certain commands)

function command(rover, orders) {
   for (let i = 0; i < orders.length; i++) {
       let order = orders[i];

       switch (order) {

           case 'f':
               moveForward(rover, order);
               break;

           case 'r':
               turnRight(rover, order);
               break;

           case 'l':
               turnLeft(rover, order);
               break;

           case 'b':
               moveBackward(rover, order);
               break;

/*BONUS 3// If we enter a letter into our input that is not one of the rover commands, nothing will happen    
               // check  default:
               // check continue; */

       }
   }

   console.log(`The rover path was: ${rover.travelLog});

}