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Descrição
Mapa Mental por Mathew Wheatley, atualizado more than 1 year ago
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Criado por Mathew Wheatley
quase 6 anos atrás
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Unit 2.2
Programming
Techniques
- Key
Words
- Variables - Contain preset,
changeable information that can
be altered throughout the code
- Constant - Contains fixed
information that is the same
whilst the code is running.
- Operators - They represent
the operations being
performed on the data
- Concatenate -
Join together
- Sequencing - This allows us to solve
complex tasks through a number of
simple steps. A step by step
solution.
- Selection - Changes the flow of a
program, depending on a set of
conditions. Used for validation,
calculation & making sense of a user's
choices
- Iteration - Repeating
things over and over
- Stepping - Skipping
things in an iteration
- EOF - End of File
- EOL - End of Line
- SQL - Standard Query
Language, a popular
human-readable
programming language
- Parameter - A special
name given to a
variable that is passed
into a subfunction.
- Variables - Contain preset,
changeable information that can
be altered throughout the code
- Operators - Represent
the operations being
performed on the data.
- +-x/ - The 4 Basic
Maths Operations
- ^ - Exponentiation or Indices
- MOD - Modulus,
Shows the remainder
- DIV - Quotient, shows the
whole divided number
- +-x/ - The 4 Basic
Maths Operations
- Data Types
- Integers - Whole
Numbers
- Floats / Reals - Numbers with
a fractional / decimal part
- Strings - Text
in a program
- Booleans - True / False
Statements
- Integers - Whole
Numbers
- Two Basic Programming Constructs
- Sequenceing
- Selection
- Sequenceing
- What is Casting?
- Change how a variables
data type is interpreted
- str(123) Converts 123 into a
string
- int("123) Converts "123"
into an integer
- Change how a variables
data type is interpreted
- Databases and Arrays
- Arrays are ordered collections of
related data where each element is
accessible by an index (Number)
- They can come as 1D or 2D
- 1D arrays use one index whereas 2D arrays
uses 2 indexes, similar to co-ordinates
- 2D arrays use numeric
index instead of names
- Record - A specific row of information
referring to one specific entity.
- Fields - A single cell
in the database.
- Arrays are ordered collections of
related data where each element is
accessible by an index (Number)
- Procedures store a set of instructions under
one name whereas functions are called by
assign their return value to something.
- Subroutines are repeatable
sections of code
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