Introduction to programming

Laboratories

Another resources….
Problem	Laboratory
Slides	Introductory slides
Introductory	Intro 1
Loops	Loops lab
Count vocals	Count vocal
Problems	Problems I
Factorial	Factorial & Combination
Prime number	Prime number
Matrix operations	Matrix lab operations
Collatz	Collatz lab
Binary search	Binary search lab
Cesar cypher	Lab cesar cypher
Stop words	Stop words lab
Matrix diagonal	Matrix lab II

History

Programming is exciting field, OOP is a revolutionary concept.

There are important person we are begin with womans:

Ada lovelace

Was a revolutionary woman!

Python

Is a programming language open source.

Data structures

The list are properly structures to keep information

List

List will be useful to keep our information.

code:

data =  [0.5, 0.1]
data2 = [True, False]
data3 = ['on', 'off']
data4 = [0.01, True, 'False']

This is an very flexible structure.

code:

data = ['Up', 'left', 'right', 'down']

We can indexing to select a particular object in the list using a index as position (starting with 0).

for instance

code:

data[0] # Return the first element -> 'Up'
data[1] # Return the second element -> 'left'

Sometimes you can uses the append method to add information a list.

code:

data = [] # Empty initialization
data.append(1)
data.append(True)
print(data) # Will return [1,True]

tuple

Similar to lists.

Dictionaries

Dictionary is extremly useful structure

code:

data  = {'key1':[True, False], 'key2':[1,0]}

Composode of keys and value key.

Loops

The loops allow us execute a sentence n-times or a number of times (?) until a condition is reached. In the case that we known which is the number of times that that is needed execute the setence will used for unlike while will be used:

while

Think in box process,

hint: Draw the boxeses.

code:

i  = 0   # Initialize the number.
while i < 10:  # The loop will be executed until the number is lesser than 10.
    print(i)   # Shows the number on screen.
    i = i + 1  # Update i each time that the loop is executed increase 1 to the current value of i.

Note that the condition is that i be lesser than 10, when i be equal to 10 then the expression 10 < 10 will return a False. Therefore, the loop not will be executed

for

this is a particular case of while.

code:

for i in range(0,10):
print(i) # will be executed the number from zero to nine.

All loop for could be constructed with while.

Functions

It is important remark the def is a keyword and will be used to define a function.

definition

Here is a definition of code:

def h(x):
return ENTROPY

lambda Functions

This kind of functions are very practical.

code:

lambda x: x**2

Work :

Review the following nobteook

Homework 1: <https://github.com/it-ces/PUBLIC-AI/blob/main/Short-labs/built_in_fnt.ipynb>_