Rust Vector Filtering & Slicing

Rust Vectors, Arrays, and Slices: Exercise-4 with Solution

Write a Rust program that creates a vector of integers containing both even and odd numbers. Filter out the even numbers from the vector and slice it to get a sub-vector containing the first 5 odd numbers. Print the sub-vector.

Sample Solution:

Rust Code:

fn main() {
    // Create a vector of integers containing both even and odd numbers
    let numbers: Vec<i32> = vec![1, 2, 3, 4, 5, 6, 7, 8, 9, 10];

    // Filter out the even numbers from the vector
    let odd_numbers: Vec<i32> = numbers.into_iter().filter(|&x| x % 2 != 0).collect();

    // Slice the vector to get a sub-vector containing the first 5 odd numbers
    let sub_vector = &odd_numbers[0..5];

    // Print the resulting sub-vector
    println!("Sub-Vector of First 5 Odd Numbers: {:?}", sub_vector);
}

Output:

Sub-Vector of First 5 Odd Numbers: [1, 3, 5, 7, 9]

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<i32> = vec![1, 2, 3, 4, 5, 6, 7, 8, 9, 10];: This line creates a vector named 'numbers' of type Vec<i32> containing both even and odd numbers.
• let odd_numbers: Vec<i32> = numbers.into_iter().filter(|&x| x % 2 != 0).collect();: This line filters out the even numbers from the 'numbers' vector using the "filter()" method. It creates a new vector named 'odd_numbers' containing only the odd numbers.
• let sub_vector = &odd_numbers[0..5];: This line slices the 'odd_numbers' vector to get a sub-vector containing the first 5 odd numbers.
• println!("Sub-Vector of First 5 Odd Numbers: {:?}", sub_vector);: This line prints the resulting sub-vector to the console using debug formatting. The {:?} format specifier prints the elements of the vector.

Rust Code Editor:

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