1-dimensional initial-value solver in Rust

ivp_solver.rs

fn f(x: Vec<f32>) -> Vec<f32> {
    return x;
}

fn main() {
    let x0: f32 = 1.0;
  
    let dt: f32 = 0.0001;
    let n: usize  = 10000;
    
    let mut x: Vec<f32> = vec![x0; n+1];
    
    for i in 1..n {
        x[i+1] = x[i] + f(x[i]) * dt;
    }
    
    println!("{}", x[n]);
}