Python Programming

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Python Programming

• Introduction to programming using python

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• Objectives
• Were learning to develop basic code with the use
  of the correct syntax and variables.
• Outcomes
• Explain what syntax is and why its required.
• Explain the use of variables.

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What is a program?

• An organized list of instructions that,
  when executed, causes the computer to behave in a
  predetermined manner. Without programs, computers
  are useless. Source Webopedia 2013
• You can think of a program like a recipe.
• It contains a list of ingredients called
  Variables.
• You can store many different types of information
  in a variable such as
• Data
• Text
• Images
• A variable on its own is like a bucket.
• You can get constant variables though

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What is a program?

• Open up python IDE and type in the following
• Print (hello world)
• What happens, when you press enter?

5
What is a program?

• Open up python IDE and type in the following
• Print (hello world)
• What happens, when you press enter?

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What is a program?

• Open up python IDE and type in the following
• 5 9
• What happens, when you press enter?

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What is a program?

• Open up python IDE and type in the following
• 5 9
• What happens, when you press enter?

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Syntax Errors

• Within python, there are a number of operators
  and functions which are built into the language.
• Youve just seen how it can handle number, do any
  other operators work? How do we subtract, divide
  or multiply. You give it a try!
• Try printing other phrases, do they work?
• Extension -
• Now type out print (hello world)
• What happens?

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Syntax Errors

• Extension -
• Now type out print (hello world)
• What happens?
• SYNTAX ERROR
• Like with English, programming languages have
  their own check similar to a grammar check. When
  you run code it checks to see whether it is in
  the form for the computer to compute. If you do
  not do this the computer throws out an error like
  above.

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Using Variables

• Variables are like a bucket, theyre used to
  store a number, data, text or image. You can
  empty it or refill it as many times as you like.
• For example, to create a variable in python we
  might do the following
• Studentname (James)
• This now means that the word James is stored in
  student name. You can even print it to the screen
  by doing. Print (Studentname).

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Using Variables

• You can do the same with numbers, for example
• Number1 10
• Number2 20
• Number3 20 10
• Print (Number3)

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Combine variables

• You can do the same with numbers, for example
• Using number3 you can combine your sentence with
  the text you stored in your variable. You could
  do the same with names or other values. Notice
  the Comma separating it.

13
Using Variables / Syntax

• Independent Task
• Using what you have learnt see if you can print
  screen and evidence the following for your
  teacher. You should evidence this by taking
  screen shots.
• Show a syntax error and annotate it to explain
  it.
• Show how to print text or numbers.
• Show how to carry out calculations with numbers.
• Show use of variables through either calculation
  or text.
• See if you can make a sentence with the use of
  two variables.
• Extension
• Leading into next weeks lesson, you will have to
  know about different types of variables and data
  types. See if you can research the types
  available and examples of their use. You could
  really extend yourself by trying some of the
  code

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Plenary

• Self Assessment
• Your teacher has issued you with a self
  assessment sheet. You will have todays objects
  and outcomes on it.
• Task
• Comment on the lesson. Talk about the positive
  experience you have had and talk about things you
  need a little more help on. If you managed to get
  onto the extension tasks, what have you found
  out?
• Paper Toss Game Delete this if you have an
  alternative task
• Get your students to write down one thing they
  have learnt in the lesson on scrap paper. Screw
  it up and throw it across the room. Once a piece
  of paper has made it up to their side, they
  should unravel the paper and write something
  different on it. Discuss what people have written
  down.