Revision

• Computer Science
• Secondary Education

Revision

To review the concepts of Programming

I feel confident in answering questions about computer programming

What is programming?

1. The order in which we write our code.
2. The programs we use.
3. A set of instructions to complete a task.
4. The result of our program when run.

 Variable

A variable is a named storage location in a computer's memory that can hold a value. The value stored in a variable can be changed throughout the program's execution, hence the term "Variable".

What type of information can be stored in a variable?

1. Only videos
2. Only sounds
3. Only pictures
4. Numbers, text, and other types of data

Name and describe the two different type of variables.

 Selection Statements

Selection allows us to make decisions in our programs. The code we use, are IF statements.

eg. IF I want to play on my PS5 THEN

I need to switch the PS5 on

Else I leave the PS5 switched off.

What does a selection statement do?

Conditional statements are used to execute different code depending on whether a certain condition is true or false. They include if, else if, and else statements.

Explain the concept of conditional statements and show examples of how they can be used in programs.

 Conditional Statements

Conditional statements are used to execute different code depending on whether a certain condition is true or false. They include if, else if, and else statements.

 Loops

Loops are used to repeat a section of code multiple times. They include for and while loops.

Functions

Functions are used to break up a program into smaller, reusable parts. They can be called multiple times throughout the program.

Debugging

Debugging is the process of finding and fixing errors in code. It involves using tools such as the serial monitor and debuggers.

What is sequencing?

1. A set of instructions.
2. A set of instructions in order.
3. A program created by code.
4. The result of our program when run.

Quiz should take 3-4 mins, allow time on later questions for students to read through the code options to figure out which option is correct. 

Comparison Operators

Challenge Time!

Scenario

Age must be 18 to go into a club.

I want to go to a club, but I want to check whether I am old enough. If I am old enough, the program must say "You can go to the party" and if I am not old enough, the program must say, "You can't go to the party".

Comparison Operator you must use is -  >=

Debugging Task

Can you find out what is wrong with the code?

Click here

Answer

What is the comparison operator for not equal to?

1. !=
2. <=
3. >=
4. ==

What is a loop?

1. A set of instructions to complete a task.
2. A set of instructions in order.
3. A repeated section of code.
4. The end result of your program.

Why do we use loops in your programs?

1. To make the program run faster.
2. To make the program more efficient.
3. They allow decisions to be made.
4. They put information onto the screen,

What is a conditional statement?

1. A decision in a program.
2. A section of the program that loops.
3. A set of instructions in order.
4. An error in the code.

What is debugging?

• Debugging code refers to the process of identifying and fixing errors, bugs, or defects in a computer program that we have created.
  

• An error occurs, when you have done something wrong in your program. You could have spelt something wrong or even missed out a symbol...

Task 2 - Debugging

In this task, you will need to debug the code using the error messages that create with code provide.

Click here

What is the process of checking a program for errors?

1. Error checking
2. De-bugging
3. Error finding
4. Mistake finding

What is the process of checking a program for errors?

1. Error checking
2. De-bugging
3. Error finding
4. Mistake finding

What type of information can be stored in a variable?

1. Only videos
2. Only sounds
3. Only pictures
4. Numbers, text, and other types of data

Let's take a look at the actual program...

Click here to take a look at how the program works

Let's look at why the program doesn't work properly!

Click here

'Make the students aware of data type casting'. This example is altered to show them!

How if, elif and else statements can be used

Click here

What is Syntax?

• The way we write a line of code is important, as the computer needs to recognise it.

• If we do not use the correct symbols and spellings in our Python coding, then the computer will not be-able to run our programs.

What are conditional statements used for?

1. Breaking the code
2. Printing out all possible options
3. Making decisions based on certain conditions
4. Making the code run faster

Algorithm Efficiency

Efficiency is crucial in computer science. It involves measuring the performance and resource usage of algorithms. We will explore different measures and methods to assess efficiency.

Measuring Efficiency

Efficiency can be measured using time complexity and space complexity. Time complexity examines the time taken by an algorithm, while space complexity evaluates the amount of memory used.

 Big O Notation

Big O Notation describes the upper limit of the time complexity of an algorithm, indicating how the runtime of the algorithm grows as the size of the input data increases.

  

Why do we use Big O Notation

Used to analyse the efficiency of a search algorithm, such as demonstrating that binary search has a time complexity of O(log n).

CORRECT

CAUSE AN ERROR

print = ("Hello")

Print("Yes!")

print("this one)

name = imput("what is your name")

name = input("what is your name")

print("this text")

fav colour = "Green"

age = 10

print("Hello", name)

print("Bye",name")