Function Procedure Example

This section provides a tutorial example on how to define and invoke a function procedure that calculates the temperature value in Celsius from Fahrenheit.

To help you understand the concept of function procedure, I wrote the following the example, function_f2c.html:

```<html>
<body>
<!-- function_f2c.html
- Copyright (c) 2015, HerongYang.com, All Rights Reserved.
-->
<pre>
<script language="vbscript">
d = F2C(70.0)
document.writeln("Received Celsius = " & d)
d = F2C(212.0)
document.writeln("Received Celsius = " & d)

Function F2C(dFahrenheit)
document.writeln("")
document.writeln("Converting Fahrenheit = " & dFahrenheit)
dCelsius = (dFahrenheit - 32.0 ) / 1.8
document.writeln("Returning Celsius = " & dCelsius)
F2C = dCelsius
End Function
</script>
</pre>
</body>
</html>
```

Here is the output:

```
Converting Fahrenheit = 70
Returning Celsius = 21.1111111111111
Received Celsius = 21.1111111111111

Converting Fahrenheit = 212
Returning Celsius = 100
Received Celsius = 100
```

Easy to understand. Right?

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