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The basic data types which can be used in a
high-level programming language are as follows:
| Data
Type |
Description |
Examples |
| Integer |
Whole
numbers, positive and negative |
23,
-45, 0 |
| Real |
All
numbers including fractions |
15.7,
-19.25, 8 |
| Character |
Anything
you see on the keyboard and some more besides... |
'A',
'z', '8','?' |
| String |
A
number of characters... |
'Hello
World'
'Gerty Snoot' |
| Boolean |
True
or false |
TRUE
or FALSE |
Operations on these data
types
| Data
Type |
Basic
Operations |
| Integer, Real |
All
arithmetic functions +, -, *, / etc.. Relational operations
- < less than
- > greater than
- <> not equal to
- >= greater than or equal to
- <= less than or equal to
(all these in the normal arithmetic
sense)
|
| Character, Strings |
Use
+ for string concatenation - adding strings together.
eg 'Bull' + 'frog' = 'Bullfrog'
Use < , > etc in the
alphabetical sense. These are all true...
- 'Abacus' < 'Beetle'
- 'Gannet' > 'Fish'
- 'Barracuda' > 'Barnacle'
|
| Boolean |
Usually
used in conditional statements...'Flag' may be a Boolean variable.... if
Flag = true then do...
if Flag then do ...
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