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8. Programming (IGCSE Computer Science)

Terms in this set (23)

variable
A named area of computer memory which can be used to store a changeable value while a computer program is running.
constant
A named area of computer memory which can be used to store a value that does not change while a computer program is running.
algorithm
A method for solving a problem set out as a series of step by step instructions with one start and one end.
sequence
Instructions that occur one after the other in a particular order.
executed
A program that is run.
selection
Making a choice or a decision in a program.
iteration
Repeating instructions in a program.
condition
A state in a program that will be met or not met.
predefined function
A pre-programmed set of instructions that returns a value.
library
A store of pre-programmed instructions that can be imported into a program.
predefined procedure
A pre-programmed set of instructions that do not return a value.
array
A store of data values that are all related and of the same data type, called list in Python.
element
An individual data location in an array / a list.
read
Outputting data from an array / a list so we can see it.
write
Inputting data into an array / a list to store it.
arithmetic operator
A symbol that represents an operation in mathematics, which completes a calculation. The main operators are: -, *, /, +
condition-controlled
A loop in the program. The number of time it repeats depends on the result of a logical test.
counter-controlled
A loop which repeats a set number of times.
flowchart
A diagram which sets out an algorithm.
logical test
A test using a relational operator which has the result True or False.
loop
A program construct where a section of code is repeated several times: it can be condition-controlled or counter-controlled.
pseudocode
A way of writing out an algorithm using words and symbols which are similar to program code.
relational operator
a symbol which compares two values. The result of the comparison is either True or False. The main relational operators are =, <>, >, <
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