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| author | Matt Wisniewski <contact.mattdylan@gmail.com> | 2017-04-20 02:12:45 +0800 |
|---|---|---|
| committer | chriseth <chris@ethereum.org> | 2017-05-03 18:03:02 +0800 |
| commit | 2b4b86aa7f72d8f7c2c4e250953d8f9018f4fd53 (patch) | |
| tree | 34b54c98a4e9f359479bbc5b73945b3c74884c98 /docs/frequently-asked-questions.rst | |
| parent | 00933b99cc64a5af1e00ed4b119fc725ddbb3513 (diff) | |
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Update common-patterns.rst
Diffstat (limited to 'docs/frequently-asked-questions.rst')
| -rw-r--r-- | docs/frequently-asked-questions.rst | 3 |
1 files changed, 1 insertions, 2 deletions
diff --git a/docs/frequently-asked-questions.rst b/docs/frequently-asked-questions.rst index 639eb83e..029e32eb 100644 --- a/docs/frequently-asked-questions.rst +++ b/docs/frequently-asked-questions.rst @@ -665,8 +665,7 @@ What does the following strange check do in the Custom Token contract? :: - if (balanceOf[_to] + _value < balanceOf[_to]) - throw; + require(balanceOf[_to] + _value >= balanceOf[_to]); Integers in Solidity (and most other machine-related programming languages) are restricted to a certain range. For ``uint256``, this is ``0`` up to ``2**256 - 1``. If the result of some operation on those numbers |