Doubt regarding Cargo update

help
1

" When you do want to update a crate, Cargo provides the command update , which will ignore the Cargo.lock file and figure out all the latest versions that fit your specifications in Cargo.toml . Cargo will then write those versions to the Cargo.lock file."(Chapter 2 of the book)

My question is that i really dont understand this point. I have tried everything from "^0.8.5" to ">0.8.5 , <0.10.0"; still its not changing the version in toml file for rand crate.

Does anyone knows answer to it

2

cargo update updates Cargo.lock

To update Cargo.toml, you can do it manually, or use for example cargo upgrade (provided by cargo install cargo-edit)

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