No, the default integer is u32. If type inference can't provide a better type, Rust will pick u32. If type inference can pick a better type it will use it. So if you create an unsuffixed int literal and use it for indexing, that literal will be a usize.
Rust will type error if you try to use u32s with an array so it's all good though. Just means that you need to specifically `: usize` things.
If you need an integer type for counting stuff, u32 is fine. If you actually need to talk about memory, use usize. The compiler will force you to do it.
I believe it used to be uint (usize) back in pre-1.0, and IIRC inference didn't work well or wasn't supposed to work at all. I recall needing explicit prefixes on my int literals back then. No longer the case.
Rust will type error if you try to use u32s with an array so it's all good though. Just means that you need to specifically `: usize` things.
If you need an integer type for counting stuff, u32 is fine. If you actually need to talk about memory, use usize. The compiler will force you to do it.