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Hajipur, Bihar, 844101
Python
Introduction to Python
Python Basics
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Python Syntax
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Python Comments
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Python Variables
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Python Data Types
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Python Casting
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Python I/O
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Python Operators
Cotrol Structures
Data Structures
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Python Strings
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Python Lists
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Python Tuples
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Python Dictionaries
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Python Sets
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Python Arrays
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Python Bytes and Bytearray
Date and Time
Functions and Module
File Handling
Python OOP
Advanced Concepts
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Python Scope
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Python Modules
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Python JSON
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Python RegEx
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Python PIP
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Python Try...Except
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Python String Formatting
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Python User Input
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Python VirtualEnv
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Python Math
Python DSA
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Python DSA
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Lists and Arrays
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Python Stacks
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Python Queues
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Linked Lists
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Python Hash Tables
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Python Trees
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Python Binary Trees
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Binary Search Trees
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Python AVL Trees
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Python Graphs
Searching Algorithms
Sorting Algorithms
Python While Loop
The while loop in Python runs a block of code as long as a condition is True.
🔹 Syntax
while condition:
# code block
The loop continues until the condition becomes False.
🔹 Simple While Loop Example
i = 1
while i <= 5:
print(i)
i += 1
🔹 Using Break in While Loop
i = 1
while i < 10:
print(i)
if i == 5:
break
i += 1
🔹 Using Continue in While Loop
i = 0
while i < 5:
i += 1
if i == 3:
continue
print(i)
🔹 Else with While Loop
i = 1
while i < 4:
print(i)
i += 1
else:
print("Loop finished")
🔹 Infinite Loop Example
Be careful: if the condition never becomes False, the loop will run forever.
while True:
print("This is an infinite loop")
break
🔹 Use Case Example
password = ""
while password != "admin":
password = input("Enter password: ")
print("Access granted")
🧪 Try It Yourself
Practice writing while loops with counters, conditions, and control statements like break and continue.
Practice Questions
Q1. Write a Python program to print numbers from 1 to 10 using a while loop.
Q2. Write a Python program to print even numbers from 2 to 20 using a while loop.
Q3. Write a Python program to accept numbers from the user until they enter 0.
Q4. Write a Python program to use break to stop a loop when the number is 7.
Q5. Write a Python program to use continue to skip printing number 5 in a loop from 1 to 10.
Q6. Write a Python program to count backwards from 10 to 1 using a while loop.
Q7. Write a Python program to print the multiplication table of 3 using a while loop.
Q8. Write a Python program to keep asking for a password until the correct one is entered.
Q9. Write a Python program to sum all numbers from 1 to 50 using a while loop and print the result.
Q10. Write a Python program to use else with a while loop to print a message after the loop ends normally.
Python
Introduction to Python
Python Basics
-
Python Syntax
-
Python Comments
-
Python Variables
-
Python Data Types
-
Python Casting
-
Python I/O
-
Python Operators
Cotrol Structures
Data Structures
-
Python Strings
-
Python Lists
-
Python Tuples
-
Python Dictionaries
-
Python Sets
-
Python Arrays
-
Python Bytes and Bytearray
Date and Time
Functions and Module
File Handling
Python OOP
Advanced Concepts
-
Python Scope
-
Python Modules
-
Python JSON
-
Python RegEx
-
Python PIP
-
Python Try...Except
-
Python String Formatting
-
Python User Input
-
Python VirtualEnv
-
Python Math
Python DSA
-
Python DSA
-
Lists and Arrays
-
Python Stacks
-
Python Queues
-
Linked Lists
-
Python Hash Tables
-
Python Trees
-
Python Binary Trees
-
Binary Search Trees
-
Python AVL Trees
-
Python Graphs
Searching Algorithms
Sorting Algorithms
