rustHow to update struct in Rust
Updating a struct in Rust is a simple process. To do so, you must first create a mutable reference to the struct. Then, you can use the dot notation to access and update the fields of the struct.
struct Person {
name: String,
age: u8
}
fn main() {
let mut person = Person {
name: String::from("John"),
age: 30
};
person.age = 31;
println!("{} is now {} years old", person.name, person.age);
}
Output example
John is now 31 years old
Code explanation
-
struct Person { name: String, age: u8 }
- This is the definition of thePerson
struct, which contains two fields:name
of typeString
andage
of typeu8
. -
let mut person = Person { name: String::from("John"), age: 30 }
- This creates a mutable reference to aPerson
struct with the nameJohn
and age30
. -
person.age = 31
- This updates theage
field of theperson
struct to31
. -
println!("{} is now {} years old", person.name, person.age)
- This prints out the updated age of theperson
struct.
Helpful links
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