Averaged variables giving NaN?? Plz help

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@danrbraine yes. My mistake, put the array declaration inside the function like this:

let avg1, avg2, avg3, avg4;
let finalAvg;
//remove the array declaration from here and move it down
function calculateFinalAvg(){
    let allAverages = [avg1, avg2, avg3, avg4];
    if (allAverages.every(e => typeof e === "number")){
    finalAvg = allAverages.reduce((a, c) => a + c)/allAverages.length;
    $w("#text150").text = finalAvg.toString();
    }
}
//and continue from here.