1number 25.859874482048838 3string 4hello, world 5string 6E is 2.718281828459045 7string 83.141592653589793 is PI 9number 10NaN 11number 12NaN 13number 1490.21 15number 1647.69 17string 18hello, obj2.toString 19string 20obj2.toString hello 21