3.1 - Arithmetic Operators
Lua supports the usual arithmetic operators:
the binary `+
´ (addition), `-
´ (subtraction),
`*
´ (multiplication), `/
´ (division),
and the unary `-
´ (negation).
All of them operate on real numbers.
Lua also offers partial support for `^
´ (exponentiation).
One of the design goals of Lua is to have a tiny core.
An exponentiation operation
(implemented through the pow
function in C)
would mean that we should
always need to link Lua with the C mathematical library.
To avoid this need, the core of Lua offers only the syntax for the
`^
´ binary operator,
which has the higher precedence among all operations.
The mathematical library (which is standard, but not part of the Lua core)
gives to this operator its expected meaning.
Copyright © 2003-2004 Roberto Ierusalimschy. All rights reserved.
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