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

Mathematica allows you to do such math and you can write complete programs in it.

Otherwise, what you seek is a "library" to extend the built-in functionality of another programming language, such as Python or Java.

In the case of Python, the decimal module enables you to specify a precision in which math operations will be peformed.