Texas Instruments voyage 200 User Manual - Page 221

Format of a Function The following examples show user-defined functions with one argument and two arguments. You can use as many arguments as necessary. In these examples, the definition consists of a single expression (or statement). cube(x) = x3 ÊË Ì Ê Function name Ë Argument list Ì Definition xroot(x,y) = y1/x ÊË Ì When defining functions and programs, use unique names for arguments that will not be used in the arguments for a subsequent function or program call. Note: Function names follow the same rules as variable names. Refer to "Storing and Recalling Variable Values" in Operating the Calculator. In the argument list, be sure to use the same arguments that are used in the definition. For example, cube(n) = x3 gives unexpected results when you evaluate the function. Arguments (x and y in these examples) are placeholders that represent whatever values you pass to the function. They do not represent the variables x and y unless you specifically pass x and y as the arguments when you evaluate the function. Calculator Home Screen 221