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Update primitive-types.md

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Simplify explanation and rephrase as per @GuillaumeGomez's suggestion.
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jocki84 2016-04-12 14:59:55 +02:00
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src/doc/book/primitive-types.md
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@ -98,10 +98,9 @@ and `i64` is a signed, 64-bit integer.
## Variable sized types
Rust also provides types whose particular size depends on the underlying machine
architecture. Their range is sufficient to express sizes of collections and they
are used to address items in a vector, for example. These types have ‘size’ as
the category, and come in signed and unsigned varieties. This makes for two types:
`isize` and `usize`.
architecture. Their range is sufficient to express the size of any collection, so
these types have ‘size’ as the category. They come in signed and unsigned varieties
which makes for two types: `isize` and `usize`.
## Floating-point types