<header>
  <h2 class="title">Math.floor()</h2>
  <p class="description">Заокруглює число вниз до найближчого цілого.</p>
</header>
<main>
  <div class="result">
    <label for="numberInput">Введіть дійсне число: </label>
    <input type="number" step="0.1" id="numberInput" placeholder="Наприклад, 4.7">
    <button onclick="applyFloor()">Заокруглити</button>
    <p id="output"></p>
  </div>
</main>

body {
  font-size: 16px;
  line-height: 1.5;
  font-family: monospace;
}

header {
  background-color: #f1f1f1;
  margin-bottom: 25px;
  padding: 15px;
  -webkit-box-shadow: 0px 0px 3px 0px rgba(118, 118, 118, 1);
  -moz-box-shadow: 0px 0px 3px 0px rgba(118, 118, 118, 1);
  box-shadow: 0px 0px 3px 0px rgba(118, 118, 118, 1);
}

header h2.title {
  padding-bottom: 15px;
  border-bottom: 1px solid #999;
}

header p.description {
  font-style: italic;
  color: #222;
}

.result {
  background-color: #f8f8f8;
  padding: 15px;
  -webkit-box-shadow: 0px 0px 3px 0px rgba(118, 118, 118, 1);
  -moz-box-shadow: 0px 0px 3px 0px rgba(118, 118, 118, 1);
  box-shadow: 0px 0px 3px 0px rgba(118, 118, 118, 1);
}

button {
  margin-top: 10px;
  background-color: #007BFF;
  border: none;
  color: white;
  padding: 5px 10px;
  cursor: pointer;
  border-radius: 4px;
}

button:hover {
  background-color: #0056b3;
}

function applyFloor() {
  const num = parseFloat(document.getElementById("numberInput").value);
  const flooredNum = Math.floor(num);
  document.getElementById("output").textContent = `Заокруглене число: ${flooredNum}`;
}

External CSS

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External JavaScript

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