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Explain the difference between floating and fixed point

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Alex Beregszaszi 2017-08-29 21:38:54 +01:00
parent 76bd8c5769
commit 435eeec5e1
2 changed files with 6 additions and 5 deletions
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5
docs/frequently-asked-questions.rst
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@ -103,11 +103,6 @@ This is a limitation of the EVM and will be solved with the next protocol update
Returning variably-sized data as part of an external transaction or call is fine.
How do you represent ``double``/``float`` in Solidity?
======================================================
This is not yet possible.
Is it possible to in-line initialize an array like so: ``string[] myarray = ["a", "b"];``
=========================================================================================

6
docs/types.rst
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@ -88,6 +88,12 @@ Operators:
* Comparisons: ``<=``, ``<``, ``==``, ``!=``, ``>=``, ``>`` (evaluate to ``bool``)
* Arithmetic operators: ``+``, ``-``, unary ``-``, unary ``+``, ``*``, ``/``, ``%`` (remainder)
.. note::
The main difference between floating point (``float`` and ``double`` in many languages, more precisely IEEE 754 numbers) and fixed point numbers is
that the number of bits used for the integer and the fractional part (the part after the decimal dot) is flexible in the former, while it is strictly
defined in the latter. Generally, in floating point almost the entire space is used to represent the number, while only a small number of bits define
where the decimal point is.
.. index:: address, balance, send, call, callcode, delegatecall, transfer
.. _address: