Generating a Vec<i32> of 0 .. n

[zeroexcuses]

    let n: usize = 1000;
    let mut ans: Vec<i32> = vec![];
    for i in 0..n {
        ans.push(i as i32)
    }
    ans

Is there a more function way to write this code? (Yes, I do need it to be i32 output).

[cuviper]

let ans: Vec<_> = (0..n as i32).collect();

[zeroexcuses]

I was trying into_vec and to_vec, but forgot about collect