Paul The Programmer

In an earlier lesson we met with Mr Integer, the variable for carrying around whole numbers. In this lesson, I thought it about time I showed you a number of other variable types which carry around values you’ll more than likely want to store and certainly need in your future code.

Firstly, we have the string, which keeps a track of characters, such as names, addresses, zip codes, product descriptions, she is allocated like this

Dim strIsPaulSexy as String

strIsPaulSexy = “NO, Paul has no sex appeal”

if we print out the value of strIsPaulSexy, the computer will tell us NO, Paul has no sex appeal – yeah, thanks a lot.

Then we have Mr Double. He can hold floating point numbers, which are numbers with a decimal place, like Pi or the money in your bank account

Dim dblPi as Double

dblPi = 3.14159265

MsgBox (dblPi * 10 & “cm”)

Run this code and you will get a message box showing you the circumference of a 10cm diameter circle. Remember the difference between an integer and a double. Integers will round up or down to the nearest whole number (e.g. 3.14.. = 3,  or 4.501 = 5)

Then there is the Gemini like Boolean, the True/False variable of two halves. Useful as a switch within our code, making something happen in one position, or ignoring the instructions in another perhaps.

Dim boolIsPaulSexy as Boolean

boolIsPaulSexy = False

If boolIsPaulSexy = True Then

    MsgBox (“Paul has sex appeal”)

End If

The computer, like most ladies, will say nothing.