Basic usage

File: basic_usage.html (click for a live demo)
<!DOCTYPE html>
<html lang="en">
<head>
  <meta charset="utf-8">
  <title>math.js | basic usage</title>
  <script src="https://unpkg.com/mathjs@14.0.0/lib/browser/math.js"></script>
</head>
<body>

<script>
  function print(value) {
    const precision = 14
    document.write(math.format(value, precision) + '<br>')
  }

  // functions and constants
  print(math.round(math.e, 3))            // 2.718
  print(math.atan2(3, -3) / math.pi)      // 0.75
  print(math.log(10000, 10))              // 4
  print(math.sqrt(-4))                    // 2i
  print(math.pow([[-1, 2], [3, 1]], 2))   // [[7, 0], [0, 7]]
  print(math.derivative('x^2 + x', 'x'))  // 2 * x + 1

  // expressions
  print(math.evaluate('12 / (2.3 + 0.7)'))    // 4
  print(math.evaluate('12.7 cm to inch'))     // 5 inch
  print(math.evaluate('9 / 3 + 2i'))          // 3 + 2i
  print(math.evaluate('det([-1, 2; 3, 1])'))  // -7

  // chained operations
  const a = math.chain(3)
      .add(4)
      .multiply(2)
      .done()
  print(a)  // 14
</script>

</body>
</html>