ProgramGuruTo get the length of a vector in Rust, you can use the len method of the Vec class.
In this example,
std::vec::Vec module, although it's included in the prelude and doesn't need to be explicitly imported.num_vector with a set of numeric values using the vec![] macro, which allows us to easily define vectors.len method on num_vector to get the number of elements in the vector. The len method returns the length of the vector as a usize value.len method to a variable named num_vector_length.println! macro to display the value of num_vector_length on the console.fn main() {
let num_vector = vec![10, 20, 30, 40, 50];
let num_vector_length = num_vector.len();
println!("Length of numeric vector: {}", num_vector_length);
}Length of numeric vector: 5
In this example,
std::vec::Vec module, although it's included in the prelude and doesn't need to be explicitly imported.str_vector with a set of string values using the vec![] macro. Each string value is defined using the String::from function to convert string literals into String objects.len method on str_vector to get the number of elements in the vector. The len method returns the length of the vector as a usize value.len method to a variable named str_vector_length.println! macro to display the value of str_vector_length on the console.fn main() {
let str_vector = vec![String::from("apple"), String::from("banana"), String::from("cherry")];
let str_vector_length = str_vector.len();
println!("Length of string vector: {}", str_vector_length);
}Length of string vector: 3
In this tutorial, we learned How to Get Length of a Vector in Rust language with well detailed examples.