Programming Constructs

Programming Constructs & Techniques

Unit 4

Remote lessons Tuesday 5/1/21

• Cover content first

• Tasks undertaken

• Check back in for q/a

Constructs & Techniques

• 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

Multiple Choice

Python, Visual Basic and Scratch are examples of high level programming languages

• True

• False

Constructs you need to know

• 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

Multiple Choice

The value of a variable cannot change while the program is running

• True

• False

More constructs

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

• Statements - putting constructs together such assignment, input and output

• 
  

Multiple Choice

Which of the following is an example of a real data type?

• 1

• Yes/No

• 1.0

• &

Statements

• 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

Multiple Select

Which of the following is not a user input?

• Text from a keyboard

• Clicks from a mouse

• Taps from a finger

• Seeing a message on screen

Control structures

• 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

Multiple Choice

Iteration that happens a set number of times is known as count-controlled iteration

• True

• False

Multiple Select

Iteration that repeats until a condition is met is condition-controlled iteration

• False

• True

OneNote tasks you need to do

• 4.16 Identifiers

• 4.17 Declaring data types in variables

• 4.18 Statements

• 4.19 Control structures