Python: First steps with Python

First Steps with Python

Display Print Text!

print("Hello World!")

Extension – fileName.py

Comments in python

# This is a comment, it starts with a hash/pound sign

Variables in Python

You don’t need to define a variable type in python, in the below case, a is an integer, b is float, c is a string, d is boolean and e is special None Type Variable

# Variables in Python 

a = 25 
b = 2.8 
c = "Hello World!" 
d = true 
e = None

Running python files in the terminal –

python hello.py 
#or 
python3 hello.py

Formatted Strings

name = input("What is your name? ")
print(f"Hello, {name}")

Conditions in Python

Create a new file conditions.py and add the following code to the file

Run with python conditions.py

number  = int(input("Number :"))

if number > 0:
    print("Number is positive")
elif number < 0:
    print("Number is negative")
else:
    print("Number is not Zero")

Sequences

name = "Anirudh";
print(name[0]);

# output: A

print(name[1])
# output: n

names = ["Ani", "Mike", "Steve"]
print(names[0])
#output: Ani

Data Structures

• list – sequence of mutable values (values can be modified)
• tuple – sequence of immutable values (values cant be modified)
• set – collection of unique values
• dict – collection of key-value pairs