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Data types in Python.

• My definition
• String: A line of text. This is represented in normal brackets and contains green speech marks. This can be printed.
• Integer: A whole number in Python. This is represented as int(x) in Python and can be used to do a range of things.
• Float: A decimal number. Represented as float in Python. Floats must be stated in code if decimals are involved.
• Google's definition
• String: In computer programming, a string is traditionally a sequence of characters, either as a literal constant or as some kind of variable.
• Integer: A number which is not a fraction; a whole number.
• Float: There is no proper definition.

Types of lists.

• Lists - Written in [x]. These can be ordered and changed.
• Tuples - Written in (x). These can be ordered but not changeable.
• Dictionary - Written in {x}. These are not ordered and not indexed.
• Example of a list: mylist = ["strawberries", "banana", "raspberries"}
• Example of a tuple: mytuple = ("Stuart" , "Amy" , "Penny" , "Bernadette")
• Example of a set: mydictionary = {"
• "Girls name" : "Harriet"
• "Boys name" : "Taylor"
• "Mum's name" : "Deborah"
• "Brother's name" :"Sam"
• :}

Dictionaries: Explained.

• mydictionary = {"
• "Girls name" : "Harriet" #This allows us to sort of make variables.
• "Boys name" : "Taylor" #The colons are in place of equals signs.
• "Mum's name" : "Deborah" #The variable Mum's name would equal Deborah
• "Brother's name" :"Sam" #We can also use premade variables in our code too.
• :}

Printing things from list: Key info

• The first string in your list is the number 0 in the list, not 1.
• Printing the whole list can be done using a for loop: for x in range (list name) print(x)
• To print the length of the list, use print(len(listname))
• To add on to the end of a list, we use listname.append(x)
• To add to a specific area of a list, we use listname.insert(position number , "x")
• To remove a specific string from a list we use listname.remove(x)
• For the remove command, if there is two of the same string in the list, the code will only remove the identical string that appears first in the list.
• To remove the last string from a list we use listname.pop(.)

Printing from a tuple: Key info

• Many of the commands are the same as on the previous slide.
• We can retrieve certain things from a tuple, using the get(x) command.