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Pseudocode Examples for Functions

Module by: Kenneth Leroy Busbee. E-mail the author

Summary: Suggested pseudocode conventions for functions along with some examples.

Concept

No standard for pseudocode syntax exists. However, there are some commonly followed conventions to help make pseudocode written by one programmer easily understood by another programmer. The following describes a method for using pseudocode for functions that would be understood by programmers. Five concepts are:

  • Use a beginning phrase word to start the function
  • Use a communication phrase word to identify the items being passed into the function
  • Use indentation to show the action part of the function
  • Use a communication phrase word to identify the items being passed out of the function
  • Use an ending phrase word to end the function
  • Use a calling phrase word to direct your program to use a fucntion

The following is a suggested outline of function phrase words:

Table 1
Item/Purpose Starting Phrase Word Ending Phrase Word
Beginning Function N/A
Communication In Pass In: none
Action N/A N/A
Communication Out Pass Out: none
Ending N/A Endfunction
Calling a Function Call: none

Examples

Here are some examples showing functions defined in pseudocode using our conventions as described above.

Example 1: pseudocode: Function with no parameter passing


Function clear monitor
  Pass In: nothing
  Direct the operating system to clear the monitor
  Pass Out: nothing
Endfunction

Example 2: pseudocode: Function with parameter passing


Function delay program so you can see the monitor
  Pass In: integer representing tenths of a second
  Using the operating system delay the program 
  Pass Out: nothing
Endfunction

Example 3: pseudocode: Function main calling the clear monitor function


Function main
  Pass In: nothing
  Doing some lines of code
  Call: clear monitor
  Doing some lines of code
  Pass Out: value zero to the operating system
Endfunction

Definitions

Definition 1: phrase word
Words used to make pseudocode logic clear to any reader.

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