You will have met data types before in ICT when using databases or spreadsheets. Let's take a look at some different types of data...

**Integers**(including Short & Long)- Whole positive numbers
- Typically 4 or 8 bytes in size (but can also be 2, 16 or 32 bytes)e.g. 104 31 12,976
**Strings**- Collection of alpha-numeric characters, white space and punctuation.
- Typically 1 or 2 bytes per character (depending on encoding used)e.g. "as54sfgjf/.dfg4 " "wibble" "Rock n Roll!"
**Booleans**- Either TRUE or FALSE
- 1 byte (really only needs 1 bit, but that makes things complicated!)e.g. TRUE/FALSE ON/OFF 1/0
**Character**- Single character
- Any alpha-numeric character, whitespace or punctuation... but only one!
- Typically 1 or 2 bytes per character (depending on encoding used) e.g. 'g' '!' '7' '@' ' ' 'Z'
**Real (Double, Single, Float etc..)**- Decimal or whole numbers x Positive or negative numbers
- More versatile data type than an integer
- Typically 8 or 16 bytes (but can also be 4, 32 or 64 bytes)e.g. -12 37.285 -0.65 62459.7777777779

Normal numeric operations can be used as part of your code...

Operation | Description | Operator | Example |
---|---|---|---|

Addition | Add one value to another | + |
x=y+z |

Subtraction | Subtract one value from another | - |
x=y-z |

Mulitplication | Multiply two or more values togther | * |
x=y*z |

Division | Divide one value by another | / |
x=y/z |

Mod | Divide one number by another and only keep the remainder | MOD |
x=y MOD z |

Div | Divide on value by another and only keep the quotient | DIV |
x = y DIV z |

Boolean operations can be used to perform conditional tests for selection (IF statements) and Iterative constructs (check when to exit a loop). For more detail on this go back to the binary logic section

Operation | Description | Operator | Example |
---|---|---|---|

AND |
Performs logical AND operation |
AND [&&] |
if ((x>y> AND (x>z)) if ((x>y) && (x>z)) |

OR |
Performs logical OR operation |
OR [| |] |
if ((x>y> OR (x>z)) if ((x>y) | | (x>z)) |

NOT |
Performs logical NOT operation |
NOT [!] |
while (!found) while (NOT found) |