Rust Array Manipulation & Slicing

Last update on December 21 2024 10:19:29 (UTC/GMT +8 hours)

Write a Rust program that creates an array of strings with size 6 and initializes it with days of the week. Remove the last 2 elements from the array and slice it to get a sub-array containing the first 3 days. Print the resulting sub-array.

Sample Solution:

Rust Code:

fn main() {
    // Declare an array of strings with size 6 and initialize it with days of the week
    let days_of_week: [&str; 6] = ["Monday", "Tuesday", "Wednesday", "Thursday", "Friday", "Saturday"];

    // Slice the array to get a sub-array containing the first 3 days
    let sub_array = &days_of_week[0..3];

    // Print the resulting sub-array
    println!("First 3 days of the week: {:?}", sub_array);
}

Output:

First 3 days of the week: ["Monday", "Tuesday", "Wednesday"]

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 days_of_week: [&str; 6] = [...];: This line declares an array named days_of_week of type [&str; 6] (array of string slices with size 6) and initializes it with days of the week as string slices.
• let sub_array = &days_of_week[0..3];: This line slices the 'days_of_week' array to get a sub-array containing the first 3 days (from index 0 to index 2).
• println!("First 3 days of the week: {:?}", sub_array);: This line prints the resulting sub-array to the console using debug formatting. The {:?} format specifier prints the array slice elements.

Rust Code Editor:

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