String – text variable like name
Integer – a whole number used for numberOfPeople or items
Real – contains decimals used for distances or measurements
Graphical objects – pictures
Boolean variables – True or False
One Dimensional (1D) arrays – used for a data structure with many pieces of data all of the same data type, such as a list of names. Pupilname[20]
Thank you to C O’Toole & A Madill from Braidhurst High School for allowing me to publish this here.
| Expressions to assign values to variables
Number=0 |
| Expressions to return values using arithmetic operations (+ – * / ^ mod)
Average=total/5 |
| Execution of lines of code in sequence demonstrating input – process- output
1. SEND “Enter First Number” TO DISPLAY 2. RECEIVE first_number FROM (INTEGER) KEYBOARD [input] 3. SEND “Enter Second Number” TO DISPLAY 4. RECEIVE second_number FROM (INTEGER) KEYBOARD [input] 5. SET total TO first_number + second_number [process] 6. SEND total TO DISPLAY [output] |
| Expressions to concatenate strings and arrays using the & operator
Bob Smith is an example of concatenation
firstName=”Bob” secondName=”Smith” print(firstName + secondName)
BobSmith |
| Use of selection constructs including simple and complex conditional statements and logical operators.
This is a simple statement as there is one conditions 1. IF pupil_mark >=50 THEN 2. SEND pass message TO DISPLAY 3. ELSE 4. SEND fail message TO DISPLAY 5. END IF
This is a complex statement as there are two conditions 1. IF pupil_mark >=50 AND assessments_mark = 100 THEN 2. SEND pass message TO DISPLAY 3. ELSE 4. SEND fail message TO DISPLAY 5. END IF |
| Iteration and repetition using fixed and conditional loops
Fixed loop below as it will loop a fixed number of times depending on the users answer number=int(input(“How many smart phones?”)) total=0.0 for phone in range(number): Name=input(“Please enter the name of the smart phone:”) cost=float(input(“Please enter the cost of the smart phone:”)) total=total + cost print(“Total cost = “,total)
Below is a Conditional Loop as it depends whether the user has any money left. money=int(input(“Please enter your pocket money in £”)) while money>0: name=input(“Please enter the name of the CD you want to buy”) cost=float(input(“Please enter the cost of the CD”)) money=money-cost print(“You have ran out of pocket money”) |
| Pre-defined functions (with parameters) – round(22.34 ) will round numbers 22.34 becomes 22 or sqrt(4) will get the square root 2, or 9 will become 3. |
| · Low-level: language that a computer will understand; consists of 0s, 1s; examples include assembly code and machine code
· High-level: language that a human will understand; use of English words such as repeat, if, loop, put · Procedural: code will processed logically and in a set order; passes data from one procedure to another using parameters · Declarative: consists of a knowledge base of facts and rules that can be queried · Object-Oriented: objects are created using classes that will contain code and data (encapsulation); data associated is known as attributes and its values are known as states; sub-classes can inherit attributes from a pre-defined class · Interpreter: takes each line of source code, translates it into machine code then passes it to processor to carry out that instruction; it works its way through the program one line at a time
· Compiler: reads the source code and translates the entire program into machine code once; machine code then saved and kept and doesn’t need to be further translated before run
|
Thank you to C O’Toole & A Madill from Braidhurst High School for allowing me to publish this here.
You have a paper copy of this in your folders but I thought you might want an electronic copy.
The document is divided into
For the exam National 5 pupils could be asked question from National 4 & 5. Higher pupils can be asked about content from all three courses.
TIP: Take a highlighter and mark of areas as you study them, use traffic lights to mark areas you need to come back to.
Quite a few students have been asking for a better explanation of how the Internet works. This sequence of videos takes you through all areas and aspects of the Internet. If you have a Khanacademy account (you do S4) then you can even earn a badge for watching the videos.
It is well worth a watch for National 4,5 & higher and it will now be making up part of our future courses.
So I was reading a programming blog from a few years ago that was asking, why can’t programmers.. program?. The article set a challenge to
Write a program that prints the numbers from 1 to 100. But for multiples of three print “Fizz” instead of the number and for the multiples of five print “Buzz”. For numbers which are multiples of both three and five print “FizzBuzz”.
Now technically the answer to the puzzle uses nothing more than Nat 5 constructs, so can you code a Python solution? Share it here if you get a nice one
(hint after the jump)
Still a lot of confusion over the definition of a function and procedure in Higher Computing Science and how they differ.
A procedure is a sub program that contains a block of code. It uses parameters to pass data to and from the main program.
A function is a sub program that contains a block of code. It uses parameters to get data from the main program and passes back a single piece of data using RETURN.
In the program below you can see a procedure called calcArea and a function called funcArea. Both of these sub programs do the same thing but they way the work is different. The last two lines of code could be merged into
MsgBox(“Function Area =” & funcArea(10,11)).
The procedure is always called on it’s own. Can you name another function shown in the program below?
Read legal implications section of BBC Bitesize. Answer the this past paper question.
