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 UNIT 2
Python Variable, datatypes, Input and Output function and comments

AGENDA

.py is the file extension of python 

1. OUTPUT FUNCTION

2. HOW TO USE VARIABLE

3. INPUT Function

4. COMMENT

//single comment

/*1. Airtime

2. Transfer

3. Balance

*/

single line

# a python program to display

multi line comment

"""

1. Airtime

2. Transfer

3. Balance

"""

print()

"""

# lab1

print("We are learning Artificial Intelligence using Python")


#lab2

print("You are welcome")age = 30course = "aritificial intelligence"

print(age)print(course)


#lab3

print("You are welcome")option = """

author: ajala

written date: 26-03-2023

topic: basis of python

"""

print(option)


#lab4a

print("You are welcome")

age = input("Enter your age")

course = input("Enter your course")

print(age)

print(course)


#lab4b

print("You are welcome")

print("Enter your age")

age = input()

print("Enter your course")

course = input()

print(age)

print(course)

print(username, "you are welcome")


Practice

# write a python program to ask the user for username#password and display the input to the user,# then display username, you are welcome ajala, you are welcome

"""

datatypes in python: int, float, str, bool,


#python program to calculate area of rectangle 

#area = length x width

#lab5

print("You are welcome")

print("Enter your length")

length = float(input())

print("Enter your width")

width = float(input())

area = int(length) * int(width)

print(area)


List Data Structure 

LIST: this is a collection which is ordered, allows changes and duplicates.it can store multiple items in a single variable.it is a built in datatype. it uses square brackets.

#empty list syntax 

variableName = []

For example, declare and initialize an empty list variable called score

score = []

# to display index

variableName[indexValue]

"""

# python list to store and display some data

color = ["yellow", "black", "purple"]

cgpa = [3.2, 3.99, 4]

score = [1, 40, 39]

print(color)

print(cgpa)

print(score)

# python list to select a particular element

cgpa = [3.2, 3.99, 4]

print(cgpa[2])

"""

# python program to emulate ANN (Artificial Neural Network) using single input, single weight, single bias

inp = [3.2, 3.99, 4]

wgt = [-0.7, 2.4, 5.9]

b = 2

#formula of ANN calculation

#output = (sum(inputs*weights))+bias

out_data = (inp[0]*wgt[0] + inp[1]*wgt[1] + inp[2]*wgt[2]) + b

print(out_data)



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