Data type is another way of saying what kind of information you are using.
Data, or information, is divided into two basic types: letters and numbers.
Data stored as letters is known as string data.
Numbers are numbers. But, numbers can be further divided into different sub-types:
Decimal Non-Decimal Single
DoubleByte
Integer
LongBoolean*
Currency*
Date**Even though these are handled differently in the program, they are actually stored as non-decimal numbers in memory.