Return Error with double return value in func

 varpcascore: Array <Double > = [3.2, 2.4, 3.5, 1.3]

funcarrayplus(pcascore:Double...) - > Find the total value of the Double {// argument
    variable —Double = 0.0

    for n in pcascore {
        total+=n
    }
    // print (total)
    pcaallscore.append(total)

    return pcaallscore
    // Cannot convert return expression of type '[Double]' to return type 'Double'
    // The error appears.
}