20240218 (list)

''''

Array(other programs) = List(Python)

* (LIST) size free

* (LIST) lots of functions

create a list by: name = [] -> can input data within [] (ex. name = [111, 343])

examples: used "data" as name for the list.

n = data itself / o = order of data in the list

append putting data into the list/ one at a time only

sort data.sort() => sorts in order/ works on both alphabet, numbers

count data.count(n) => how many of n is in the list?

pop data.pop(o) == deletes last data/ deletes by list order = (1) is 2nd data

extend data.extend(another list) => adds another list data into current list, no integers

clear data.clear() => clears the list

remove data.remove(n) => quite literally removes n from list/ not order-based but actual data-based

index data.index(n) => searches for earliest n in the list/ data.index(n, o) => searches for n from m (for 중복 cases)/ data.index(n,o1,o2) => searches for n from m to o

insert data.insert(o, n) => inserts n before data of o's order

reverse data.sort(reverse=True) => sorts list but reverse order

'''

data = []

print(data, type(data))

data.append(10)

data.append(20)

data.append(30)

print(data, type(data))

data.pop() # default: last number of the list

print(data, type(data))

data.pop(1) # number within parenthesis = list order. this case = 1st = 10

print(data, type(data))

data.append(10)

data.append(50)

data.append(30)

print(data, type(data))

data.sort()

print(data, type(data))

data.sort(reverse=True)

print(data, type(data))

print(data.count(10))

more = [2007, 34343]

examples = 3

data.extend(more)

print(data, type(data))

data.remove(2007)

print(data, type(data))

data.append(20)

data.append(10)

data.append(3034)

data.insert(2, 100)

print(data)

print('index', data.index(10))

data.insert(0, 1301239)

print(data)