for (r = 0; r <9; r++) {
    for (c = 1; c < 9; c++) {
        let tile=document.createElement("div")
        tile.classList.add("tile")
        document.getElementById("board").append("tile")
        
    }
}

//I have the id of board in html and tile i have mentioned it in the css i am trying to add tile to my board...