IT 130

Here's a simple page that uses a predefined square-root function. Here's a reference to predefined functions (look under JavaScript Math Objects and Javascript Global Properties and Functions for the most common functions).

Dave Reed has created a library of useful random functions. Here is one example that uses the random functions. Here's a link to these functions.

• Simple function example
• Currency conversion with function
• Function example with form elements

Function page created in class

Functions that are called as part of an expression should have a return value. Functions that are called by a user event (button press) should not have a return value. A more comprehensive reference to functions can be found online.

Function concepts and terms you should know:

• argument and parameter
• local variable
• return value
• using functions as abstractions