mercredi 14 août 2019

Adding function/else

I am trying to add a function to this code for conversion to Kelvin, it seems as though I can't do it. The Celsius to Fahrenheit works fine, i thought I'd start simple just specify the Fahrenheit to Kelvin.

function convert(degree) {
  var x;
  if (degree == "C") {
    x = document.getElementById("c").value * 9 / 5 + 32;
    document.getElementById("f").value = Math.round(x);
  } else {
    x = (document.getElementById("f").value - 32) * 5 / 9;
    document.getElementById("c").value = Math.round(x);
  } else if {
    x = (document.getElementById("f").value - 32) * 5 / 9 + 273.15;
    document.getElementById("k").value = Math.round(x);
  }
}
<!DOCTYPE html>
<html>

<body>

  <h2>JavaScript Celcius to Fahrenhet</h2>

  <p>Insert a number into one of the input fields below:</p>

  <p><input id="c" onkeyup="convert('C')"> degrees Celsius</p>

  <p><input id="f" onkeyup="convert('F')"> degrees Fahrenheit</p>

  <p><input id="k" onkeyup="convert('K')"> degrees Kelvin</p>

  <p>Note that the <b>Math.round()</b> method is used, so that the result will be returned as an integer.</p>

</body>

</html>

Aesthetically everything is the same but function is lost when i add 'else' for Kelvin

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