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

Many functional languages natively support arbitrary-precision numbers. Some have already been mentioned here, but I'll repeat them for completeness:

• Most versions of Haskell.
• Miranda, a predecessor to Haskell.
• Some implementations of Scheme. In particular, PLT Scheme.
• Erlang.