cerc-io/solidity
15
0
Fork 0
mirror of https://github.com/ethereum/solidity synced 2023-10-03 13:03:40 +00:00
Code Issues Actions Packages Projects Releases Wiki Activity

Update types.rst

Browse Source
This commit is contained in:
Yoichi Hirai 2016-11-25 14:51:38 +01:00 committed by GitHub
parent a747f1d2c3
commit a755805879
1 changed files with 8 additions and 7 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

15
docs/types.rst
View File

@ -169,13 +169,6 @@ Fixed Point Numbers
Rational and Integer Literals
-----------------------------
Solidity has a number literal type for each rational number.
Integer literals and rational number literals belong to number literal types.
Moreover, all number literal expressions (i.e. the expressions that
contain only number literals and operators) belong to number literal
types. So the number literal expressions `1 + 2` and `2 + 1` both
belong to the same number literal type for the rational number three.
Number literal expressions retain arbitrary precision until they are converted to a non-literal type (i.e. by
using them together with a non-literal expression).
This means that computations do not overflow and divisions do not truncate
@ -198,6 +191,14 @@ long as the operands are integers. If any of the two is fractional, bit operatio
and exponentiation is disallowed if the exponent is fractional (because that might result in
a non-rational number).
.. note::
Solidity has a number literal type for each rational number.
Integer literals and rational number literals belong to number literal types.
Moreover, all number literal expressions (i.e. the expressions that
contain only number literals and operators) belong to number literal
types. So the number literal expressions `1 + 2` and `2 + 1` both
belong to the same number literal type for the rational number three.
.. note::
Most finite decimal fractions like ``5.3743`` are not finitely representable in binary. The correct type
for ``5.3743`` is ``ufixed8x248`` because that allows to best approximate the number. If you want to