Basic Python Notes

What is Python?

• Scientific computing
• Artificial Intelligence
• Web development
• Data analysis
• Automation
• Physics simulations

1. Writing Your First Python Program

print("Hello World")

OUTPUT

Hello World

print() is used to display output on the screen.

2. Variables in Python

x = 10
name = "Physics"
pi = 3.14 

Rules for Variables Cannot start with a number No spaces allowed. Case-sensitive. 

age = 20
Age = 30 

Both are different variables.

3. Data types 

Data Type	Example
Integer (int)	5
Float (float)	3.14
String (str)	"hello"
Boolean (bool)	True, False

a = 5
b = 2.5
c = "Einstein"
d = True

4. Taking User Input

name = input("Enter your name: ")
print(name)

Numerical Input

x = int(input("Enter a number: "))

For decimal numbers:

x = float(input("Enter value: "))

5. Basic Operator 

Arithmetic Operators Example:

a = 10
b = 3

print(a + b)
print(a - b)
print(a * b)
print(a / b)
print(a % b)
print(a ** b)

6. Conditional Statements

x = 10

if x > 5:
    print("x is greater than 5")

if-else

x = 2

if x % 2 == 0:
    print("Even")
else:
    print("Odd")

if-elif-else

marks = 75

if marks >= 90:
    print("A")
elif marks >= 70:
    print("B")
else:
    print("C")

7. Loops in Python 

for loop

for i in range(5):
    print(i)
    

OUTPUT

0
1
2
3
4

while loop

x = 1

while x <= 5:
    print(x)
    x += 1 

OUTPUT

Run started
Initializing environment
Installing packages
Running code
1

2

3

4

5

Run completed in 43.69999998807907ms

from functions and advanced topics to be included here......