How to check if an Array is Not Empty in Rust - Step by Step Examples

How to check if an Array is Not Empty in Rust ?

In Rust, you can use the len method to check if a vector (dynamic array) is not empty.

In this example,

We create a vector named numbers with some elements.
We check if the vector is not empty using the len method and comparing it with 0, and store the result in the variable notEmpty.
Finally, we print whether the vector is not empty or not.

fn main() {
    let numbers = vec![1, 2, 3];
    let notEmpty = numbers.len() != 0;
    println!("Array is not empty: {}", notEmpty);
}

Array is not empty: true

In this example,

We create an empty vector named emptyVector.
We check if the vector is not empty using the len method and comparing it with 0, and store the result in the variable notEmpty.
Finally, we print whether the vector is not empty or not.

fn main() {
    let emptyVector: Vec<i32> = vec![];
    let notEmpty = emptyVector.len() != 0;
    println!("Array is not empty: {}", notEmpty);
}

Array is not empty: false

In this tutorial, we learned How to check if an Array is Not Empty in Rust language with well detailed examples.