Create and populate a 2d vector

To create and populate a 2D vector in Rust, you can use the following code:

fn main() {
    let mut vector_2d: Vec<Vec<i32>> = Vec::new();

    let row1: Vec<i32> = vec![1, 2, 3];
    let row2: Vec<i32> = vec![4, 5, 6];
    let row3: Vec<i32> = vec![7, 8, 9];


    println!("{:?}", vector_2d);

This code creates a 2D vector called vector_2d using the Vec type. It initializes an empty vector using Vec::new(). Then, three rows are created as separate vectors (row1, row2, and row3) using the vec! macro. These rows are then pushed into the vector_2d vector using the push method.

Finally, the content of the 2D vector is printed using the println! macro and the {:?} format specifier.

Note: Make sure to include the Vec module at the top of your code file with use std::vec::Vec; to use the Vec type.

I hope this helps! Let me know if you have any further questions.