AS Level CS (9618) 11 Programming

11.1 Programming basics 11.2 Programming constructs 11.3 Structured programming

Constant

"a named value that cannot change during the execution of a program."

Variable

"a named value that can change during the execution of a program."

Function

"a set of statements that can be grouped together and easily called in a program whenever required

Library routine

"a tested and ready-to-use routine available in the development system of a programming language that can be incorporated into a program."

Procedure

"a set of statements that can be grouped together and easily called in a program whenever required

Parameter

"a variable applied to a procedure or function that allows one to pass in a value for the procedure to use."

By value

"a method of passing a parameter to a procedure in which the value of the variable cannot be changed by the procedure."

By reference

"a method of passing a parameter to a procedure in which the value of the variable can be changed by the procedure."

Header (procedure or function)

"the first statement in the definition of a procedure or function

Argument

"the value passed to a procedure or function."