Rust Tutorials

How to check if an Array is Empty in Rust

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How to check if an Array is Empty in Rust ?

Answer

In Rust, you can check if a vector (dynamic array) is empty by using its is_empty method.

✐ Examples

1 Check if Given Vector with Elements is Empty

In this example,

We create a vector named numbers with some elements.
We check if the vector is empty using the is_empty method and store the result in the variable is_empty.
Finally, we print whether the vector is empty or not.

Rust Program

fn main() {
    let numbers = vec![1, 2, 3];
    let is_empty = numbers.is_empty();
    println!("Vector is empty: {:?}", is_empty);
}

Output

Vector is empty: false

2 Check if Empty Vector is Empty

In this example,

We create an empty vector named empty_vector.
We check if the vector is empty using the is_empty method and store the result in the variable is_empty.
Finally, we print whether the vector is empty or not.

Rust Program

fn main() {
    let empty_vector: Vec<i32> = Vec::new();
    let is_empty = empty_vector.is_empty();
    println!("Vector is empty: {:?}", is_empty);
}

Output

Vector is empty: true

Summary

In this tutorial, we learned How to check if an Array is Empty in Rust language with well detailed examples.

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How to check if an Array is Empty in Rust

How to check if an Array is Empty in Rust ?

Answer

✐ Examples

1 Check if Given Vector with Elements is Empty

Rust Program

Output

2 Check if Empty Vector is Empty

Rust Program

Output

Summary

More Rust Arrays Tutorials