tic-tac-toe/tictac.js

let a = [
    [1, 2, 3],
    [4, 5, 6],
    [7, 8, 9]
]
const prompt = require('prompt-sync')({ sigint: true });

ticTacToe(a);

function ticTacToe(a) {
    let pipe = "|";
    for (let x = 0; x < a.length; x++) {
        let row = a[x];
        let column = '';
        for (let y = 0; y < row.length; y++) {
            column = column.toString() + pipe;
            column = column.toString() + row[y].toString();
        }
        column = column.toString() + pipe;
        console.log(column)
    }
}

getUserInput();

function getUserInput() {
    return prompt("Was ist deine Eingabe?");
}

//console.log(input);