convert fahrenheit to celsius formula javascript

JavaScript
const celsiusToFahrenheit = celsius => celsius * 9/5 + 32;

const fahrenheitToCelsius = fahrenheit => (fahrenheit - 32) * 5/9;

// Examples
celsiusToFahrenheit(15);    // 59
fahrenheitToCelsius(59);    // 15<!DOCTYPE html>
<html>
<head>
    <title>Fahrenheit From Celsius</title>
</head>
<body>
    <script>
        var cTemp = 100; // temperature in Celsius
        // Let's be generous with parentheses
        var hTemp = ((cTemp * 9) /5 ) + 32;
        document.write("Temperature in Celsius: " + cTemp + " degrees<br/>");
        document.write("Temperature in Fahrenheit: " + hTemp + " degrees");
    </script>
</body>
</html>
Source

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