Programming Constructs

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These are the building blocks used to create programs

Many constructs are common across languages

This is why your knowledge can be transferred between languages

Command words - the programmer cannot use them in variable names etc

Identifiers - when the programmer names things they are creating identifiers such as variables and constants

Two things needed to declare a constant or variable: a name and a data type

Data types - character, string, integer, real or float, Boolean

Statements - putting constructs together such assignment, input and output

The core aspect of many programming languages

They define the basic actions that can be performed, and often combine more than one language construct

Most statements are case sensitive and some require punctuation marks to mark the end of the statement

Sequence: One action after another, none missed, none repeated

Selection: Actions chosen based on a supplied condition which is evaluated to true or false

Iteration - Actions repeated a number of times, typically until a condition is no longer true

4.16 Identifiers

4.17 Declaring data types in variables

4.18 Statements

4.19 Control structures