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lol!
5e0 doesn't mean 5E0 hexadecimal but 5 x 10^0 = 5
Scientific notation.
Hi!

hey sitting duck, i found this: http://www.dummies.com/how-to/content/how-to-write-numbers-in-scientific-notation.html

the notation is used for very small numbers, or very big numbers, it is sometimes relying on the user interface system used, that decides by themself when to use which notation, for the 5e0 notation, it is as darkbeam described just a five

5e10 would mean 5x10^10=50000000000
introducing a very large number, in this case it has exactly 10 zeroes following the front part

as a reminder you can think of it as moving the decimal point, if the number is positive
it is moved to the right like this:
5.0e10 means 5.0x10^10=50000000000.0
the decimal point was just not displayed before
and if you now use a negative value at the end, it means shift the decimal point to the left, making
the number smaller
like this:
5.0e-10 means 5.0x10^-10=0.00000000005


and for you as non math nerd, the definition of the exponentiation includes that something^0 equals to 1
which is why the first notation lead to 5 ( 5e0 = 5x10^0=5x1=5 )

sorry still not clear about Christian ::*:: am I right to assume e = 10^0 = 1 ?

so would (for example) 4.9e-1 = 4.9x10^0-1 = 4.9x1-1 = 3.9 - yes ?