Why is there no non-standard Integer type?

Question

Why does the STL not contain an unlimited integer data type?

It seems to me that this is a data type whose purpose is similar to a string type.
Programmers would not have to worry about overcrowded values ​​and work with much larger numbers.

So I'm curious if there is a specific reason for his absence.

This is not a problem of how to implement or use it in a third-party library, but simply a question of why the language has not come with one yet. Any references on this subject are welcome.

Answer 1

You probably mean arbitrary precision arithmetic or large numbers.

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Answer 2

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