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Creating a Multi-Statement Function
You can also create a user-defined function whose definition consists of multiple
statements. The definition can include many of the control and decision-making
structures (
If, ElseIf, Return, etc.) used in programming.
Note: For information about similarities and differences between functions and
programs, refer to Programming.
For example, suppose you want to create a function that sums a series of reciprocals
based on an entered integer (
n):
When creating the definition of a multi-statement function, it may be helpful to visualize it
first in a block form.
Ê
Func and EndFunc must begin and end the function.
Ë Variables not in the argument list must be declared as local.
Ê
Ë
Ì
Í
Î
Ê
Func
Local temp,i
If fPart(nn)ƒ0 or nn{0
Return “bad argument”
0!temp
For i,nn,1,M1
approx(temp+1/i)!temp
EndFor
Return temp
EndFunc
1
n
---
1
n 1–
------------...
1
1
---+++
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