How to Access Items in a Vector in Rust - Step by Step Examples

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How to Access Items in a Vector in Rust ?

Answer

To access items in a vector in Rust, you can use indexing and slicing operations.

✐ Examples

1 Access Single Element by Index

In this example,

We create a vector named my_vector containing some elements.
We access a single element from the vector using square brackets [] and specify the index of the element we want to access.
The element at the specified index is returned.
We print the accessed element to the console.

Rust Program

fn main() {
    let my_vector = vec!["apple", "banana", "cherry", "date"];

    // Access single element by index (e.g., index 2)
    let accessed_element = &my_vector[1];

    // Print accessed element
    println!("{:?}", accessed_element);
}

Output

"banana"

2 Access Multiple Elements by Index

In this example,

We create a vector named my_vector containing some elements.
We use a range of indices inside square brackets [] to access multiple elements from the vector.
The elements within the specified range are returned as a new vector.
We print the accessed elements to the console.

Rust Program

fn main() {
    let my_vector = vec!["apple", "banana", "cherry", "date"];

    // Access multiple elements by indices (e.g., indices 0 to 2)
    let accessed_elements = &my_vector[0..=2];

    // Print accessed elements
    println!("{:?}", accessed_elements);
}

Output

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

3 Access Elements Using Iterator

In this example,

We create a vector named my_vector containing numeric elements.
We use an iterator with a closure to filter and access elements based on a logical condition.
The elements that meet the condition are returned as a new vector.
We print the accessed elements to the console.

Rust Program

fn main() {
    let my_vector = vec![10, 20, 30, 40, 50];

    // Access elements greater than 30 using iterator
    let accessed_elements: Vec<_> = my_vector.iter().filter(|&x| *x > 30).collect();

    // Print accessed elements
    println!("{:?}", accessed_elements);
}

Output

[40, 50]

Summary

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

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How to Access Items in a Vector in Rust - Step by Step Examples

How to Access Items in a Vector in Rust ?

Answer

✐ Examples

1 Access Single Element by Index

Rust Program

Output

2 Access Multiple Elements by Index

Rust Program

Output

3 Access Elements Using Iterator

Rust Program

Output

Summary

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