1. Programming In

2. Using the internet…Find … what does “case sensitive” mean
Starter
Using the internet…Find …
what does “case sensitive” mean
what a programming language is..
3 benefits of Python

3. Objectives Outcomes Learn about python as a programming language
Learn about expressions & variables and their use
Create several successful programs
Outcomes
All-Level 4- State what a programming language is and what a program is. Get half marks on the test (7/15)
Most-Level 5- Have used variables and with help get 75% on the test (12/15)
Some-Level 6- Written their own programs and independently got maximum marks on the test.

4. Housekeeping Open the ICT levels spread sheet and find python tab
Read each Yellow box and answer in the white box.

5. copy the Unit resources
Copy the folder: Unit 6 Python
From
Common K  ICT  Year 8 To
My Documents  ICT  Year 8

6. Targets.
Open the self evaluation workbook and fill in the boxes in green ellipse (squashed circle)
This workbook will be used throughout the python unit – DO NOT LOSE IT. It will be used at the end by the teacher to assess your ICT Level.

7. Python Python is a programming language
A set of words and rules for instructing a computer to perform specific tasks.
The term programming language usually refers to high-level languages, such as BASIC, C, C++, Python etc
Each Programming language has a set of keywords and a special syntax for writing program instructions.

8. Learning to program is going to be fun – so lets keep it simple.
Why Python
org 100h
main proc
mov ah, ;
mov dx,offset hello_message
int 21h :
retn
hello_message db 'Hello, world!$'
main endp
end main
Assembler
python
print ("Hello, World!“)
#include <iostream>
int main() {
std::cout << "Hello World!" << std::endl;
return 0; }
C++
Learning to program is going to be fun – so lets keep it simple.

9. What is a program
Programming is not telling the computer what you want to do….it is telling it EXACTLY HOW to do it. (get student to walk round v robot)
A program is a sequence of instructions that specifies how to perform a computation.
The computation might be something mathematical, such as solving a system of equations
It can also be a symbolic computation, such as searching and replacing text in a document or moving a graphic icon (sprite) on a game.

10. TRadition print (“Hello, World”)
It is tradition that the first program everyone creates is to say Hello world”.
From the start menu – all programs / python 3.3 / idle
Open Idle(python GUI)
MAKE SURE YOU ARE IN THE PYTHON SHELL
Enter the following and press enter
print (“Hello, World”)
If you see this window on top – look for the python shell window.
This one

11. Expressions
Try typing some of these expression in idle, pressing return after each one
print ( )
print (8*6)
print (10-5+6)
print ( 2  +       2)

12. Expressions
You have been using expressions 2 values and an operator Even the follows this rule Operators, you already know. Perhaps the multiplication is written differently as a * (on the number pad) At the moment python is acting like a calculator.
2+2
addition
2-2
subtraction
2*2
multiplication
2/2
division

13. Syntax
In computer science, the syntax of a programming language is the set of rules that define the combinations of symbols that are considered to be correctly structured programs in that language. Aka syntax means that special key words and characters combine to result in a program.

14. Syntax print hello print (hello) PRINT(“hello”) print (a + b)
The syntax of a programming language is the set of rules that control if a program is correct.
You tried print (“Hello, World”) and it worked – a correct program.
Try these
print hello
print (hello)
PRINT(“hello”)
print (a + b)
print (5 + 6 / 7 +)
Syntax is CRITICAL in programming. A computer cannot take an educated guess at your instructions.
Computers just follow exactly what you tell them to do.

15. Variables spam = 15 print (spam)
A variable is just a box with a number in it.
When we use variable in our code the computer uses the value in the variable.
To store the value 15 in the variable and display it
spam = 15
print (spam)
Try it.
Now try these
spam = spam + 12
print (spam)
spam = spam + spam
spam = spam * spam

16. Variables In python eggs is not the same as EGGS.
This time we have 2 variables eggs and fizz
You can assign them by
eggs = 15
fizz = 10
What be the output of the following, go on try it.
print( eggs )
print( eggs + fizz )
spam = eggs + fizz
print( spam )
eggs = fizz
print( EGGS )
In python eggs is not the same as EGGS.
Python is case sensitive which means YOU MUST BE CAREFUL 15 25
>>>nothing 10
Traceback (most recent call last):
File "<pyshell#37>", line 1, in <module>
EGGS
NameError: name 'EGGS' is not defined

17. Complete Self Assessment quiz
Complete Self Assessment quiz from lesson 1 folder you copied at the start of the lesson.

18. Plenary Mark the self assessment
And update your self-evaluation for this lesson.

19. Fun time
Try the space ship challenge tdemo_spaceship in common K/ temp_store.