Python Syntax

Python Tutorial

🐍 Python Syntax – Complete Beginner Guide

Python syntax refers to the rules and structure used to write valid Python programs.
Python is known for its simple, readable, and clean syntax, making it ideal for beginners.

1️⃣ What is Python Syntax?

Python syntax defines:

  • How statements are written

  • How blocks of code are structured

  • How indentation replaces braces {}

📌 Python code looks close to English, which improves readability.

2️⃣ First Python Program ⭐

print("Hello, Python!")

Output

Hello, Python!

✔ No main() function
✔ No semicolon ;

3️⃣ Indentation (Most Important Rule ⭐⭐)

Python uses indentation to define blocks of code.

✅ Correct

if 5 > 2:
print("Five is greater than two")

❌ Incorrect

if 5 > 2:
print("Error")

📌 Indentation replaces {} used in C/C++/Java.

4️⃣ Comments in Python ⭐

Single-line Comment

# This is a comment

Multi-line Comment

"""
This is a
multi-line comment
"""

📌 Comments are ignored by the interpreter.

5️⃣ Variables Syntax ⭐

No need to declare data type explicitly.

x = 10
name = "Amit"
price = 99.5

✔ Python is dynamically typed

6️⃣ Case Sensitivity ⚠️

Python is case-sensitive.

age = 20
Age = 30

✔ age and Age are different variables

7️⃣ Python Statements

Each line is a statement.

x = 5
y = 10
print(x + y)

📌 Semicolons are optional (not recommended).

8️⃣ Input & Output Syntax ⭐

name = input("Enter name: ")
print("Hello", name)

9️⃣ Conditional Syntax (if) ⭐

age = 18

if age >= 18:
print(“Adult”)
else:
print(“Minor”)

✔ Colon : starts a block
✔ Indentation defines block body

🔟 Loop Syntax ⭐

for Loop

for i in range(1, 6):
print(i)

while Loop

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

1️⃣1️⃣ Functions Syntax ⭐

def greet():
print("Welcome")greet()

📌 def keyword defines a function

1️⃣2️⃣ Python Keywords (Few Examples)

Reserved words with special meaning:

if, else, for, while, def, return, class, import

❌ Cannot be used as variable names

1️⃣3️⃣ Common Syntax Errors ❌

❌ IndentationError
❌ Missing colon :
❌ Misspelled keywords
❌ Using undeclared variables
❌ Mixing tabs & spaces

📌 Interview Questions (Syntax Based)

Q1. Does Python use braces {}?
👉 ❌ No

Q2. What defines a block in Python?
👉 Indentation

Q3. Is semicolon required in Python?
👉 ❌ No

Q4. Is Python case-sensitive?
👉 ✅ Yes

🔥 Real-Life Importance

✔ Clean & readable code
✔ Faster development
✔ Fewer syntax errors
✔ Beginner-friendly
✔ Widely used in AI, ML, Web, Automation

✅ Summary

  • Python syntax is simple & readable

  • Indentation is mandatory

  • No semicolons or braces

  • Dynamically typed language

  • Case-sensitive

  • Essential foundation for Python programming & interviews

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