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Component 02/Section 05 - Programming


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alphanumeric
The collective name for letters, digits and symbols.
AND operator
One of the Boolean operators. The result is true if both of the conditions are true. If either are false, the result is false.
argument
A value that a parameter of a sub program actually takes.
arithmetic operator
An operator that programs use to carry out simple mathematical operations.
array
A data structure where all the data is stored and defined under one variable name.
assignment operator (=)
Assigns the value on the right hand side to the name on the left hand side.
Boolean
A logical system using the operators OR, AND and NOT. The Boolean data can take one of two values, either true or false.
Boolean data type
A variable or statement which can have either a TRUE or FALSE value.
Boolean operators
A set of words used as connectives to combine one or more statements or variables to produce either a TRUE or FALSE value.
casting
A way of changing from one data type to another.
character (as a data type)
A type of data which represents a single alphanumeric item. This could be the letter "a", an exclamation mark or a "non-printable" (invisible) item like a space or tab.
comparison operator
Compares two values and outputs either true or false.
concatenation
Joining strings together.
condition-controlled loop
An iteration statement that repeats a set of instructions until a condition is met.
constant
A named value which cannot be altered as the program is running.
count-controlled loop
An iteration statement that repeats a set of instructions a given number of times.
data type
TelIs you what kind of data it is, e.g. integer, real, string, etc.
database
A data structure where data is held in tables made up of fields and records.
DO WHILE loop
Type of iteration statement.
ELSEIF
A further logical check performed when the previous statement resulted in a FALSE outcome. It allows multiple conditions to be checked for their truth value.
field (database)
A column of a database used to store a category of data.
file handling (programming)
Reading from and writing to external files.
flat-file database
A database that only contains one table of data.
FOR loop
A type of count-controlled iteration statement.
function
A sub program that takes parameters and returns a value.
global variable
A variable which can be accessed by any line of code within a program
global variable (programming)
A variable available throughout the whole program.
IF statement
Type of selection statement.
integer (data type)
A numerical data type for whole numbers.
iteration statement
A statement which makes the program repeat a set of instructions.
local variable
A variable that is only defined and usable within certain parts of a program.
loop (programming)
A set of instructions that the program repeats until a condition is met or count is reached.
nested IF statement
A selection statement made up of multiple IF statements inside each other.
one-dimensional array
A data structure which has a single pointer to each of its individual items or elements. (a bit like marks on a ruler.)
operator
A special symbol like +, *, =, /, AND, ==, that carries out a particular function.
OR operator
One of the Boolean operators.
parameter
A variable that a subprogram requires in order to run - it's only defined within the sub program.
procedure
A subprogram that carries out a list of instructions.
program
A set of instructions that can be executed on a computer.
program flow
The order in which statements are executed in a program (controlled with selection and iteration statements).
programming
the act of writing program code
Query
A request to retrieve data that meets certain conditions from a database.
real (data type)
A numerical data type for decimal numbers.
record (database)
A row of a database that contains data about a specific item.
relational database
A database that contains multiple tables linked together by key fields.
REPEAT-UNTIL loop
Type of iteration statement.
selection statement
A statement which causes the program to make a choice and flow in a given direction - e.g. IF and SWITCH-CASE statements.
SQL
sometimes referred to known as SEE-QUIL or ES-QUE-ELLE
SQL (acronym)
Structured Query Language
string
A data type for text.
string data type
consists of a series of characters
string manipulation
The processes used to change part or parts of a series of characters based on rules.
sub program
A set of code within a program that can be called at any time from the main program.
SWITCH-CASE statement
A type of selection statement.
two-dimensional array
A data structure which is an array of arrays. It will have a pointer for each item and a pointer for each item within that item. (a bit like the x and y coordinates on a graph)
variable
A named value which can be changed as the program is running.
WHILE loop
Type of iteration statement