1:  const num = 42;

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

   3:  const bool = true;

   4:  const nul = null;

   5:  const und = undefined;

   6:  

   7:  const numFromStr = Number(str);    // String to number

   8:  const numFromBool = Number(bool);  // Boolean to number (1 for true, 0 for false)

   9:  // const numFromBig = Number(big);    // BigInt to Number - potential loss of precision if outside Number range. Explicit conversion is discouraged. Better use BigIntLib.

  10:  const numFromNul = Number(nul);    // Null to number (0)

  11:  const numFromUnd = Number(und);  // Undefined to number (NaN).

  12:  const numSpecial = parseInt("hello"); // NaN

  13:  

  14:  console.log(numFromStr);

  15:  console.log(numFromBool);

  16:  console.log(numFromNul);

  17:  console.log(numFromUnd);

  18:  console.log(numSpecial);

  19: