BigInt: large integers without decimal

In a few sentences

In brief

The type has its own rules for arithmetic and data exchange.

Useful to know

BigInt presents integers of arbitrary magnitude within the resources of the environment. Literal has suffix n: 9007199254740993n is BigInt, and not Number. Do not mix directly with Number in plain arithmetic . [1]

In 5n / 2n, the result is 2n, because the fractional part is cut off. This distinguishes it from a random decimal sum model. For large identifiers, check the exchange format as well: the standard JSON.stringify does not serialize BigInt directly. Contracts text representation if the value has to go through JSON.

Sources

For further detail and to check the information:

[1] MDN — BigInt ↗