Variables, Constants and Data Types

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Data types and their usage[edit]

Pseudocode
Data Type Description Usage Example
INTEGER
A whole number Uses the normal denary system
123, -123, 0
REAL
Any number that has fractional parts/decimals Written with at least one digit either side of a decimal point
12.4, 3.0, -17.34
CHAR
A single character A single character enclosed between single quotation marks
'a', '@', '5'
STRING
A series of zero or more characters No, or a series of characters enclosed between double quotation marks
"banana", "Q173hf", "John Doe"
BOOLEAN
A logical Expression True or False
TRUE, FALSE
DATE
Any valid date Use the format:
dd/mm/yyyy

If a different format must be used, use a comment to explain your decision.

21/10/2015, 03/07/1985, 12/11/1955

Variable Declarations[edit]

Python has no variable declarations.

Language General Usage Example Usage
Pseudocode
DECLARE <Identifier> : <Data Type>
DECLARE Weight : INTEGER
DECLARE Mass : REAL
DECLARE Material : STRING
VB.NET
Dim <Identifier> As <Data Type>
Dim Weight As Integer
Dim Mass As Double
Dim Material As String

Constants[edit]

Python has no constants.

Language General Usage Example Usage
Pseudocode
CONSTANT <Identifier> = <Value>
CONSTANT Pi = 3.14
CONSTANT e = "2.718"
CONSTANT Multiplier = 10
VB.NET
Const <Identifier> As <Data Type> = <Value>
Const Pi As Double = 3.14
Const e As String = "2.17"
Const Multiplier as Integer = 10

Assignments[edit]

Language General Usage Example Usage
Pseudocode
<Identifier> ← <Value>
Name ← "Stephen"
Age ← 47
Weight ← 19.32
VB.NET
<Identifier> = <Value>
Name = "Stephen"
Age = 47
Weight = 19.32
Python
<Identifier> = <Value>
Name = "Stephen"
Age = 47
Weight = 19.32