3.5 seconds is a string.
79.2 is a double.
12 is an integer.

Now, converting to other types:
3.5 seconds as a double is 3.5
3.5 as an integer is 3
Converting back to a string results in 3

Now using type casting instead:
As a string - 98.6 degrees
As a double - 98.6
As an integer - 98