Constants - Variables - Data Types

There are 9 types of data types. These include boolean, string, integer, double, decimal, character, byte, float and long.

• Boolean is a binary value, being either true or false.

true

• String is used for storing characters in word form.

"hello world"

• Integer is used to store whole numbers (32 bit values).

457568368

• Double is used to store numbers where there are numbers before and after the decimal point, using 64 bits of memory.

3.3

• Decimal is used to store larger numbers with information before and after the decimal point, using 128 bits of memory.

12.593

• Character is used to store single letters.

'A'

• Byte is used to store a byte( eight 1's or 0's).

00101101

• Float is used to store a 32 bit decimal number, which must be defined as being a float using "F" or "f" to distinguish it from a double, or it may cause compilation errors.

9.4F

• Long integer is also used to store whole numbers (However these are 64 bit values).

7846354759340276482

• Constants are used to create a variable of a specified data type that can never be changed after declaration, all global variables should be declared constant.

const int 32