FTT-JavaScript/aulajs13.html at master · luizgustavo77/FTT-JavaScript · GitHub

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<!DOCTYPE html>
<html>
    <head>
    <title>JavaScript Aula 13</title>
    <script>

        function getNumberList(quantidade) {

                let numeros = [];

                for (i=0; i < quantidade; i++) {
                    numeros.push(Math.random() * 100);
                } //for

                return numeros;
            }

            function getMean(numList) {

                let sum = 0;

                for(i=0; i<numList.length; i++) {
                    sum += numList[i];
                } //for

                return sum / numList.length;
            }

            function gerarNumeros() {

                limpaItens();

                var n = getNumberList(parseInt(document.getElementById("inputNumber").value));
                var m = getMean(n);

                //console.log(n);
                //console.log(m);

                document.getElementById("mediaInfo").innerHTML = m;

                var lista = document.getElementById("numerosInfo");

                n.forEach(function(val) { //função anonima

                    var li = document.createElement("li");

                    li.innerHTML = "Valor " + val;

                    lista.appendChild(li);
                });

            }

            function limpaItens() {
                document.getElementById("numerosInfo").innerHTML = '';
                document.getElementById("mediaInfo").innerHTML = '';
            }
        </script>
</head>

<body>
    <h1>JavaScript Aula 13</h1>
    <h2>for, Math.random()</h2>

    <button onclick="gerarNumeros();">Gerar números</button>
    <button onclick="limpaItens();">Limpa Itens</button>
    <hr>
    <p><label>Quantidade de números: </label><input id="inputNumber" type="number" value="10" required> </input></p>
    <p id="mediaInfo" style="width: 50%; background-color: lightgoldenrodyellow">
    </p>
    <ol id="numerosInfo" style="width: 50%; background-color: lightpink">
    </ol>
</body>
</html>