// define our tuple let ourTuple: [number, boolean, string]; // initialize correctly ourTuple = [5, false, 'Coding God was here']; // We have no type safety in our tuple for indexes 3+ ourTuple.push('Something new and wrong'); // instead use our readonly tuple const ourReadonlyTuple: readonly [number, boolean, string] = [5, true, 'The Real Coding God']; // throws error as it is readonly. ourReadonlyTuple.push('Coding God took a day off');