Interactive Python Lab

While Loops

Playground load hone par auto-run hota hai. Apne Python ko trace karne ke liye Mera Code Chalao par click karein — har step live animated.

Samjhein·Line by line

Replay·Step by step

Challenge·Guided prompts

XP·...

Data Flow Pipeline

foundation Track

Variables & Types

If / Else Conditions

While Loops

For Loops & Range

Hello World & Print

String Operations

Arithmetic & Math

Lists Basics

Functions Intro

Input & Output

Samjhein

Line 1

n = 1, total = 0. Both loop counter and accumulator are set.

Yeh approach kyun?

We need two variables: n drives the loop condition, total accumulates the sum. Initialising before the loop is essential — without it Python raises NameError.

Structured Explanation

Overview

while loop tab tak chalti rehti hai jab tak condition True hai. Jaise "jab tak kaam baaki hai, karte raho".

Analogy

Jaise college mein attendance tab tak leni hai jab tak sab present na ho jaayein.

Step-by-step

while condition: likho
Loop body mein kaam karo
Loop variable update karo (warna infinite loop!)
break se beech mein niklo, continue se skip karo

Visual

i = 0 while i < 5: print(i) i += 1

Common mistakes

Loop variable update karna bhool jaana — infinite loop ho jaata hai
Off-by-one errors — < aur <= mein confusion

Practice questions

1 se 100 tak ke numbers ka sum while loop se nikalo
User input tab tak lo jab tak valid na ho

Complexity

Time

O(n)

Space

O(1)

Complexity Overview

O(1)space

O(log n)

O(n)time

O(n log n)

O(n²)

n = 8range 1-20

N = 8 pe

Complexity	Operations
O(1)	1
O(log n)	3
O(n)	8
O(n log n)	24
O(n²)	64

Challenge

While loop se 1-10 tak numbers print karo, phir unka sum print karo.

Hint

Counter variable rakho aur har iteration mein update karo.

Code Studio

While Loops

Monaco Ready

Python ready hai

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Output Console

0 lines

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Real-World Applications

1

Event listeners in Node.js

2

Polling remote server queues

3

Game development core loops

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