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Functions

Functions. CE 311 K - Introduction to Computer Methods Daene C. McKinney. Introduction. Functions Named Constants Structured Programming. Functions. A block of statements (with a name) located between Function and End Function statements

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Functions

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  1. Functions CE 311 K - Introduction to Computer Methods Daene C. McKinney

  2. Introduction • Functions • Named Constants • Structured Programming

  3. Functions • A block of statements (with a name) located between Function and EndFunction statements • Executed (called) when name appears in a program along with arguments • Program: • … • var = Name( Argument list ) • End Program Program • Function Name( Arguments ) As Type • … statements • … • Return expression • End Function Function

  4. Example – FtoC Call Function Return Value

  5. Example – Bank Account

  6. Example – Bank Account

  7. Named Constants • We often need to use constants, like PI in our computations. Const Constant_Name As Data_Type = value • Example: Const PI As Double = 3.14159

  8. no yes no yes Structured Programming • Sequence • Selection • Repetition

  9. Structured Programming Start Input Subprogram Get Some Input Calculation Subprogram Make Some Calculations Output Subprogram Print Some Output Stop

  10. Summary • Functions • Named Constants • Structured Programming

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