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Intro to Excel VBA Programming
- 1. Intro to VBA Programming Ivey Technology Club
- 2. Intro to VBA Programming Agenda Variables Types Declaration Assignment Functions/Subroutines Parameters Returning values Loops While For
- 3. Intro to VBA Programming Agenda Variables Types Declaration Assignment Functions/Subroutines Parameters Returning values Loops While For
- 4. Intro to VBA Programming You‟ve seen variables before X =5 Y=X+3 Variables can be reused and changed X =5 X=2 X=X+7 The same principles apply in programming Variables Functions Loops
- 5. Intro to VBA Programming Computers are stupid Must tell them exactly what to do The more we tell them, the faster they run Each language does this differently We will focus on VBA Variables Functions Loops
- 6. Intro to VBA Programming All variables should be declared first This will prevent hard to find errors It is not required that you do so, but HIGHLY encouraged To force yourself, use “Option Explicit” at the beginning of VBA files Variables Functions Loops
- 7. Intro to VBA Programming To declare a variable in VBA, the basic structure is: Dim <name> as <type> Ex. Dim X as Integer Variables Functions Loops
- 8. Intro to VBA Programming Dim means “new Dimension” Fancy VBA way of saying new variable When declaring a variable, you should know what it will be used for Different variable types are used to store different data Variables Functions Loops
- 9. Intro to VBA Programming Types include: Integer (whole numbers like 3) Float (decimal numbers like 1.25) Double (just like float, can store wider range of values) Characters (like „a‟) String (a number of characters in a row such as “Ivey”) MANY Variables more Functions Loops
- 10. Intro to VBA Programming Types include: Integer (whole numbers like 3) Float (decimal numbers like 1.25) Double (just like float, can store wider range of values) Characters (like „a‟) String (a number of characters in a row such as “Ivey”) MANY Variables more Functions Loops
- 11. Intro to VBA Programming To assign a value to a use the “=“ operator Ex. Dim x As Integer (declare the variable) x=5 Variables Functions Loops
- 12. Intro to VBA Programming Agenda Variables Types Declaration Assignment Functions/Subroutines Parameters Returning values Loops While For
- 13. Intro to VBA Programming Functions Take in input, process it, and produce output Variables Functions Loops
- 14. Intro to VBA Programming Functions General must also be declared format of function declaration: Function <name>(ByVal <parameterName> As <type>) As <returnType> Subroutines are declared the same way, but do not have a return type Variables Functions Loops
- 15. Intro to VBA Programming ByVal refers to “by value” This will make a copy of the variable and its value ByRef could also be used This Don‟t will modify the original variable worry too much about this for now Variables Functions Loops
- 16. Intro to VBA Programming To explicitly return a value from a function, assign the return value to the function name itself Variables Functions Loops
- 17. Intro to VBA Programming Subroutines are the same as functions, except for 2 important differences: 1. They do not have explicit return types 2. They cannot be used directly in the spreadsheet Variables Functions Loops
- 18. Intro to VBA Programming Agenda Variables Types Declaration Assignment Functions/Subroutines Parameters Returning values Loops While For
- 19. Intro to VBA Programming Loops Loops allow us to repeatedly perform the same task easily There are different kinds of loops including: While Until For Variables Functions Loops
- 20. Intro to VBA Programming “While” true “Until” true loops while a certain condition is loops until a certain condition is “For” loops for a specified number of iterations Variables Functions Loops
- 21. Intro to VBA Programming Questions, anyone ?