Cs eoy

• 1. E- waste

  Name for an old digital device that has been thrown away
• 1. waste

  • Can impact the environment
• Manufacturing of device (computers, phones, etc.)


  1. Raw material extraction

  2. Smelting and refining

  3. Component manufacturing

  4. Assembly

  5. Packaging

  6. Transportation
• Some materials used in electronics are in short supply
• 1. waste can cause damage to land and contamination to water supplies, leading to pollution and health issues
• Subprogram


  A piece of reusable code that does a job for you
• Types of subprograms


  • Procedure
  • Function
• Subprograms


  • Make the code shorter
  • Allow us to put useful code at the top to be reused
  • Can reuse code over and over again
  • If subprogram is broken, you can quickly fix it in one spot rather than many spots
  • Provide a layer of abstraction
• Subprograms can take care of things while we concentrate on something else
• Functions and procedures should be organized at the top of the program to help it organized
• However, they can be used anywhere in the main body
• DEF


  Short for define, indicates you are starting a subprogram
• Parameter


  Arguments imported by the user
• WEEE regulations were set up to set targets for collection, recycling and recovery of computing and electronic items
• Responsible recycling is where you reuse components such as plastic and glass but dispose of dangerous substances safely
• Major manufacturers now have recycling programmes to minimise e-waste
• Abstraction


  Getting rid of the exact details of something to focus on the key aspects
• Decomposition


  Breaking down a problem into smaller parts to make it easier to solve
• Pattern recognition

  Identifying common themes in problems so you can apply known solutions
• Metal used in the manufacture of rechargeable batteries, printer inks and toners

  • Cadmium
• Metal used in the manufacture of circuit boards and cable sheathing

  • Lead
• Metal used in the manufacture of LCD screens

  • Mercury
• Chemical compound used to make casings

  • Hexavalent chromium
• Toxic compounds added to plastics, circuit boards, and connectors to make them more fire retardant

  • Polybrominated diphenyl ethers
• Toxic compounds added to plastics, circuit boards, and connectors to make them more fire retardant

  • Polychlorinated biphenyls (PCBs)
• Concatenate meaning
• Concatenation means ?

  Joining to strings together
• why do programmers use flowcharts

  Communicated ideas in a understandable format at a higher level of abstraction
• Runtime error 


  Errors which can cause an error to crash
• Logic error 


  Errors which cause incorrect or unwanted behaviours
• Syntax errors 


  Errors in the use of programming language such as Missing ‘:’
• Increment 


  To add one or fixed amount
• Decrement 


  Subtract 1 or fixed amount
• String 


  a word
• integer 


  A whole number
• Booleoan 


  True/false value
• Float 


  A Decimal
• A list 


  Several values stored in a list
• Definite loop 


  for loop
• Indefinite loop 


  While loop