Possible values for two D6s

combination.ts

const allCombinations: Record<string, number> = {};
let numberCombinations = 0;

for (let a = 1; a <= 6; a++) {
  for (let b = 1; b <= 6; b++) {
    let sum = a + b;

    if (allCombinations?.[sum]) {
      allCombinations[sum] = allCombinations[sum] + 1;
    } else {
      allCombinations[sum] = 1;
    }

    numberCombinations++;
  }
}

console.dir(allCombinations);
console.log(numberCombinations);

const porcentages = Object.fromEntries(
  Object.entries(allCombinations).map(([key, value]) => [
    key,
    ((value / numberCombinations) * 100).toFixed(2) + '%',
  ]),
);

console.dir(porcentages)