Define a Function

• The definition begins with the function name left of the equal sign

• Then follows the function symbol and the list of parameter

• The function expression is defined right of the second equal sign

• You get the function sign with the keys Ctrl + 5

• A call of a self-defined function must be marked with the function sign, left to the function name

• The arguments can be values, variable names, another function or any expressions

• The variables, defined as formal parameter, have own scope inside the function. They are visible in the function only and not outside their function.

• It is allowed to use the same names in the argument list and elsewhere in the worksheet

• In addition to the parameters, all global variables defined on the worksheet can be used within a function