How to Initialize a Vector in Rust - Step by Step Examples

How to Initialize a Vector in Rust ?

To initialize a vector in Rust, you can use the vec! macro, which creates a new vector containing the specified elements.

In this example,

We use the vec! macro to create a vector containing integers. The vec! macro takes a list of values separated by commas and creates a vector with those values.
Inside the vec! macro, we provide integer values.
The vector is then assigned to a variable named int_vector.
Finally, we print the vector using the println! macro to display its contents.

fn main() {
    let int_vector = vec![1, 2, 3, 4, 5];
    println!("{:?}", int_vector);
}

[1, 2, 3, 4, 5]

In this example,

We use the vec! macro to create a vector containing strings. The vec! macro takes a list of values separated by commas and creates a vector with those values.
Inside the vec! macro, we provide string values enclosed in double quotes.
The vector is then assigned to a variable named str_vector.
Finally, we print the vector using the println! macro to display its contents.

fn main() {
    let str_vector = vec!["apple", "banana", "cherry"];
    println!("{:?}", str_vector);
}

["apple", "banana", "cherry"]

In this example,

We use the vec! macro to create a vector containing boolean values. The vec! macro takes a list of values separated by commas and creates a vector with those values.
Inside the vec! macro, we provide boolean values (true or false).
The vector is then assigned to a variable named bool_vector.
Finally, we print the vector using the println! macro to display its contents.

fn main() {
    let bool_vector = vec![true, false, true];
    println!("{:?}", bool_vector);
}

[true, false, true]

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