a/b javascript

ab

var r = 0,
    len = 1000000,
    a = 0, b = 0;
 
while (len--) {
    r = Math.floor(Math.random() * 2) + 1;
 
    if (r === 1) {
        a++;
    } else {
        b++;
    }
}
 
console.table([['a', a], ['b', b]]);