Untitled

<!DOCTYPE html>
<html lang="pt-br">
  <head>
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    <meta charset="utf-8">
    <meta name="viewport" content="width=device-width, initial-scale=1, shrink-to-fit=no">

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    <title>JavaScript</title>
  </head>
  <body>
    <div class="container">
      <h1>JavaScript</h1>
      <div class="row">
        <div class="col">
          <div class="jumbotron">
            <h1 class="display-4">Soma</h1>
            <p class="lead">Utilize este programa para somar dois números inteiros</p>
            <form class="form-inline">
              <div class="form-group mx-sm-3 mb-2">
                <input type="text" class="form-control" id="numero1" placeholder="Digite um número">
              </div>
              <div class="form-group mx-sm-3 mb-2">
                <input type="text" class="form-control" id="numero2" placeholder="Digite um número">
              </div>
              <button type="button" onclick="somar()" class="btn btn-primary mb-2">Calcular</button>
            </form>
            <hr class="my-4">
            <h1 class="display-4" id="soma">???</h1>
          </div>
        </div>
      </div>

      <div class="row">
        <div class="col">
          <div class="jumbotron">
            <h1 class="display-4">Cotação</h1>
            <p class="lead">Solicite um valor real e a cotação do dólar, calcule e mostre o valor convertido.</p>
            <form class="form-inline">
              <div class="form-group mx-sm-3 mb-2">
                <input type="text" class="form-control" id="numero1" placeholder="Valor">
              </div>
              <div class="form-group mx-sm-3 mb-2">
                <input type="text" class="form-control" id="numero2" placeholder="Cotação do dolar">
              </div>
              <button type="button" onclick="cot()" class="btn btn-primary mb-2">Calcular</button>
            </form>
            <hr class="my-4">
            <h1 class="display-4" id="soma1">???</h1>
          </div>
        </div>
      </div>


    </div>


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    <script type="text/JavaScript">

        function somar(){
            var n1 = document.getElementById('numero1').value;
            var n2 = document.getElementById('numero2').value;
            var r = parseInt(n1) + parseInt(n2);

            document.getElementById('soma').innerHTML = r;
        }

      function cot(){
        var n1 = document.getElementById('numero1').value;
        var n2 = document.getElementById('numero2').value;
        var r = parseInt(n1) * parseInt(n2);

        document.getElementById('soma1').innerHTML = r;
      }
    </script>
  </body>
</html>