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| author | Alex Beregszaszi <alex@rtfs.hu> | 2017-08-30 04:38:54 +0800 |
|---|---|---|
| committer | Alex Beregszaszi <alex@rtfs.hu> | 2017-09-04 22:57:05 +0800 |
| commit | 435eeec5e15d94ffc2dff01dd09c8c92c697dc4e (patch) | |
| tree | 07a83cfc5496566c5310bd87db5df221397ecdf0 | |
| parent | 76bd8c57694b9335dc5ce29204f57825b4a565eb (diff) | |
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Explain the difference between floating and fixed point
| -rw-r--r-- | docs/frequently-asked-questions.rst | 5 | ||||
| -rw-r--r-- | docs/types.rst | 6 |
2 files changed, 6 insertions, 5 deletions
diff --git a/docs/frequently-asked-questions.rst b/docs/frequently-asked-questions.rst index 5f1a981e..d9a68ed1 100644 --- a/docs/frequently-asked-questions.rst +++ b/docs/frequently-asked-questions.rst @@ -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"];`` ========================================================================================= diff --git a/docs/types.rst b/docs/types.rst index d1b5a3f1..71a4b0e6 100644 --- a/docs/types.rst +++ b/docs/types.rst @@ -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: |