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