Year 9 Half Term 1 Revision
- Created by: EastwoC01
- Created on: 17-10-19 11:00
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- Year 9 Computer Science
- Ciphers
- Substitution
- an encrypted note/message where the letters shift by a certain amount
- A key is how many times you shift the letter eg Caesar Cipher had of three
- Transpotion
- transposition cipher is a method of encryption by which the positions held by units of plaintext are shifted according to a regular system
- Plaintext
- This message is plain text
- Cipher Text
- wklv phvvdjh lv lq wkh Fdhvhu Flskhu
- Cryptanalysis
- deciphering coded messages without being told the key.
- Substitution
- Python
- Variables
- Variables are a storage area in the memory of a computer given a label. The contents of the variable can be changed throughout a program
- Print is a statement is a command that the programmer gives to the computer. For example:print "Hi there!" This command has a verb and other details . In this case, the command print means "show on the screen
- Input Python has an input function which lets you ask a user for some text input. You call this function to tell the program to stop and wait for the user to key in the data.
- Python
- Variables
- Variables are a storage area in the memory of a computer given a label. The contents of the variable can be changed throughout a program
- Print is a statement is a command that the programmer gives to the computer. For example:print "Hi there!" This command has a verb and other details . In this case, the command print means "show on the screen
- Input Python has an input function which lets you ask a user for some text input. You call this function to tell the program to stop and wait for the user to key in the data.
- Data Types
- A string is a group of characters made up of only letters
- A float is not a whole number
- An integer is a whole number
- Boolean is True or false statements
- Is,Elif or Else
- Loops
- For
- While
- A comment not a affected or influencing the code
- Variables
- Python
- Data Types
- A string is a group of characters made up of only letters
- A float is not a whole number
- An integer is a whole number
- Boolean is True or false statements
- Is,Elif or Else
- Loops
- For
- While
- A comment not a affected or influencing the code
- Variables
- Ciphers
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