What programming language will enable me to enter a very long number without converting it to floating point?

Question

What would be the best way to do the following.

Enter a very long number, lets say 500,000 digits long without it going into scientific notation; and then am able to

Answer 1

Haskell (when using GHC) also has builtin support for arbitrarily long integers. Here's a snippet showing the length of a number converted to a string.

Prelude> length $ show $ 10
2
Prelude> length $ show $ 1 + 2^2000000
602060
Prelude> let x = 2^200000
Prelude> let y = 2^200000 + 5
Prelude> y - x
5

Or you could just type 2^200000 at the interactive console and wait a couple minutes for it to print out all 600k+ characters. I figured this way was a little simpler to demonstrate.