Visual Basic: String, Integer and Double Data Types

Posted: January 31st, 2012 | Author: Brian Martin (BlinkBrian) | Filed under: Visual Basic Tutorial (Series) | No Comments »

In the last tutorial we looked at Visual Basic Data Types.

Variables must have a data type. The data type tells the computer how much storage space to provide. It also tells the computer the operations available.

Data Type	Values	Operations
String	Any text, names, addresses, phone numbers	+, <,>,=,<>
Integer	Whole Numbers, i.e. 0, 1, 2, -4. Use this when you want to perform math operations.
Double	Decimal numbers ie; 10.3. Use Double when you want to perform math operations.

Exercise – Adding decimal numbers

Open the “AddingNumbers” program. Change the data type for variables a, b, c from Integer to Double.

Test your program by using the following input data: a = 3.3 and b = 2

What is the result?

Exercise – Adding Characters

Open the “AddingNumbers” program. Change the data type for variables a, b, c from Double to String
Test your program by using the following input data: a = o and b = k
What is your result?

Exercise – Developing a basic calculator

Create a new console application and save it as “Calculator”. Using the same techniques as the “AddingNumbers” program, create a basic calculator that adds, substracts, multiplies and divides two numbers by the user.