Rust Vector Mapping & Slicing

Rust Vectors, Arrays, and Slices: Exercise-5 with Solution

Write a Rust program that creates a vector of floating-point numbers. Map each element of the vector to its square root. Slice the resulting vector to get a sub-vector containing the elements from index 2 to index 6. Print the sub-vector.

Sample Solution:

Rust Code:

fn main() {
    // Create a vector of floating-point numbers
    let numbers: Vec<f64> = vec![1.0, 2.0, 3.0, 4.0, 5.0, 6.0, 7.0, 8.0, 9.0, 10.0];

    // Map each element of the vector to its square root
    let squared_numbers: Vec<f64> = numbers.into_iter().map(|x| x.sqrt()).collect();

    // Slice the resulting vector to get a sub-vector containing the elements from index 2 to index 6
    let sub_vector = &squared_numbers[2..7];

    // Print the sub-vector
    println!("Sub-Vector: {:?}", sub_vector);
}

Output:

Sub-Vector: [1.7320508075688772, 2.0, 2.23606797749979, 2.449489742783178, 2.6457513110645907]

Explanation:

Here is a brief explanation of the above Rust code:

• fn main() { ... }: This line defines the main function, which is the entry point of the Rust program.
• let numbers: Vec<f64> = vec![1.0, 2.0, ...];: This line creates a vector named numbers of type Vec<f64> (vector of floating-point numbers) and initializes it with some floating-point numbers.
• let squared_numbers: Vec<f64> = ...: This line maps each element of the numbers vector to its square root using the "map()" method and collects the results into a new vector named 'squared_numbers'.
• let sub_vector = &squared_numbers[2..7];: This line slices the 'squared_numbers' vector to get a sub-vector containing the elements from index 2 to index 6.
• println!("Sub-Vector: {:?}", sub_vector);: This line prints the sub-vector to the console using debug formatting. The {:?} format specifier prints the elements of the vector.

Rust Code Editor:

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