rustRust null value example
Null values in Rust are represented by the Option enum. Option is an enum with two variants, Some and None. Some is used to wrap a value, while None is used to indicate the absence of a value.
Example code
let x: Option<i32> = None;This code creates a variable x of type Option<i32> and assigns it the value None. This indicates that x does not have a value.
Helpful links
Related
More of Rust
- How to convert Rust bytes to a struct?
- How to use Unicode in a regex in Rust?
- How to replace a capture group using Rust regex?
- How to match a URL with a regex in Rust?
- YAML serde example in Rust
- How to replace strings using Rust regex?
- How to declare a constant Rust HashMap?
- How to match whitespace with a regex in Rust?
- How to split a string with Rust regex?
- How to create a HashMap of structs in Rust?
See more codes...