How to get First Item in a Vector in Rust

How to get First Item in a Vector in Rust ?

To get the first item in a vector in Rust, you can use indexing with the square brackets notation and specify the index 0.

In this example,

We declare a vector named vec with elements of a specific type, such as integers or strings.
We use indexing with square brackets [] to access the first item in the vector by specifying the index 0.
The index 0 corresponds to the first item in Rust, as indexing starts from zero.
Finally, we print the first item to standard output.

fn main() {
    let vec = vec![1, 2, 3, 4, 5];
    let first_item = vec[0];
    println!("First item in vector: {}", first_item);
}

First item in vector: 1

In this example,

We declare a vector named str_vec containing strings.
We use indexing with square brackets [] to access the first string in the vector by specifying the index 0.
The index 0 represents the first string in Rust vectors.
Finally, we print the first string to standard output.

fn main() {
    let str_vec = vec!["Hello", "World"];
    let first_string = str_vec[0];
    println!("First string in vector: {}", first_string);
}

First string in vector: Hello

In this tutorial, we learned How to get First Item in a Vector in Rust language with well detailed examples.