public int L = 0.1f;

public float calcAutocorrelation(float[] frame)

    int N = frame.Length; //frame size

    float result = 0f;
    for (var n = 0; n < N; n++){
        result += frame[n] * frame[n + L] //in programming this is not possible as L is a float but formula says this is needed???
        //I could cast the L to an INT type but the paper states that L should range between 0 and 1, and in-code we'll probably end up with L rounded to 0 most of the time.
    }

    return result;
}