filter (JavaScript Array Method)

const tnwAges = [25, 18, 29, 20, 40, 32, 53, 24];

function tnwFun1(){
    document.getElementById("demo").innerHTML = tnwAges.join("
");
}

function tnwFun2(){
    const result = tnwAges.filter(chkAge);
    document.getElementById("demo").innerHTML = result.join("
");
}

function chkAge(age){
    return age > 20;
}