1:  const num = 42;

   2:  const str = String(num);        // Number to string

   3:  

   4:  const bigFromStr = BigInt(str);  // String to BigInt

   5:  const bigFromBool = BigInt(true); // BigInt value 1n.  Use with care (less common).

   6:  console.log(bigFromStr);

   7:  console.log(bigFromBool);

   8:  

   9:  

  10: