Applying to tech jobs? Check out Exponent for interview prep
EVENTS
UPCOMING
PAST
PRIVATE EVENTS
SOLO
PUZZLES
CODE GOLF
OPTIMIZATION
MULTI
LEADERBOARDS
CLASH OF CODE
BOT PROGRAMMING
CODING ESCAPE
COMMUNITY
CONTRIBUTIONS
PLAYGROUNDS
DISCORD
FORUM
LIVE STREAMS
LEARNING
COACHING
COURSE
Log In
Sign Up
Loops
Details
share
Definition
External resources
For Loop
While Loop
Loops
Associated training puzzles
Horse-racing Duals
XP
+75 XP
Completed by 107,829 CodinGamers
0
done
Defibrillators
XP
+50 XP
Completed by 78,277 CodinGamers
0
done
MIME Type
XP
+50 XP
Completed by 87,837 CodinGamers
0
done
Unary
Unary
XP
+50 XP
Completed by 104,214 CodinGamers
0
done
ASCII Art
XP
+50 XP
Completed by 131,167 CodinGamers
0
done
Temperatures
XP
+50 XP
Completed by 287,751 CodinGamers
0
done
The Descent
XP
+50 XP
Completed by 719,160 CodinGamers
0
done
Scrabble
XP
+100 XP
Completed by 20,444 CodinGamers
0
done
Network Cabling
XP
+100 XP
Completed by 15,472 CodinGamers
0
done
Stock Exchange Losses
XP
+100 XP
Completed by 32,253 CodinGamers
0
done
ASCII Art - Code Golf
Completed by 3,235 CodinGamers
0
done
The Descent - Code Golf
Completed by 4,552 CodinGamers
0
done
Temperatures
Completed by 23,839 CodinGamers
0
done
Unary - Code Golf
Unary - Code Golf
Completed by 7,904 CodinGamers
0
done
Network Cabling - Code Golf
Completed by 2,043 CodinGamers
0
done
Ghost Legs
by java_coffee_cup
Ghost Legs
XP
+50 XP
Completed by 16,118 CodinGamers
0
done
Lumen
by Sceurpien
Lumen
XP
+50 XP
Completed by 7,948 CodinGamers
0
done
Bank Robbers
by Shotokhan
Bank Robbers
XP
+50 XP
Completed by 7,563 CodinGamers
0
done
Rectangle Partition
by java_coffee_cup
Rectangle Partition
XP
+50 XP
Completed by 6,889 CodinGamers
0
done
May the Triforce be with you!
by Ninsuo
May the Triforce be with you!
XP
+50 XP
Completed by 6,125 CodinGamers
0
done
Dungeons and Maps
by Di_Masta
Dungeons and Maps
XP
+50 XP
Completed by 5,065 CodinGamers
0
done
Happy Numbers
by java_coffee_cup
Happy Numbers
XP
+50 XP
Completed by 4,771 CodinGamers
0
done
Rugby score
by Bob
Rugby score
XP
+50 XP
Completed by 3,580 CodinGamers
0
done
Pirate's treasure
by T0nda
Pirate's treasure
XP
+50 XP
Completed by 3,430 CodinGamers
0
done
7-segment scanner
by tutubalin
7-segment scanner
XP
+50 XP
Completed by 3,312 CodinGamers
0
done
Folding Paper
by VilBoub
Folding Paper
XP
+50 XP
Completed by 3,274 CodinGamers
0
done
Horse-racing Hyperduals
by JBM
Horse-racing Hyperduals
XP
+50 XP
Completed by 2,549 CodinGamers
0
done
Hidden Messages In Images
by AndreMarasca
Hidden Messages In Images
XP
+50 XP
Completed by 2,370 CodinGamers
0
done
Shoot Enemy Aircraft
by Remi.
Shoot Enemy Aircraft
XP
+50 XP
Completed by 2,019 CodinGamers
0
done
Rooks Movements
by Cr3aHal0
Rooks Movements
XP
+50 XP
Completed by 1,679 CodinGamers
0
done
Object Insertion
by irmo322
Object Insertion
XP
+50 XP
Completed by 1,666 CodinGamers
0
done
Create 'Turn Here' Signs
by Lisa-Has-Ideas
Create 'Turn Here' Signs
XP
+50 XP
Completed by 1,551 CodinGamers
0
done
Snail Run
by Eurostar02
Snail Run
XP
+50 XP
Completed by 1,425 CodinGamers
0
done
Unique Prefixes
by otpv
Unique Prefixes
XP
+50 XP
Completed by 1,059 CodinGamers
0
done
Blackjack solver
by CeliTop
Blackjack solver
XP
+50 XP
Completed by 1,010 CodinGamers
0
done
Word Search for Programmers
by Lisa-Has-Ideas
Word Search for Programmers
XP
+50 XP
Completed by 1,006 CodinGamers
0
done
Sand Fall
by yhuberla
Sand Fall
XP
+50 XP
Completed by 996 CodinGamers
0
done
Shadow Casting
by manychois
Shadow Casting
XP
+50 XP
Completed by 983 CodinGamers
0
done
Periodic table spelling
by Edjy
Periodic table spelling
XP
+50 XP
Completed by 960 CodinGamers
0
done
Frame the picture
by Grarzyna
Frame the picture
XP
+50 XP
Completed by 844 CodinGamers
0
done
Queen control
by Akip1
Queen control
XP
+50 XP
Completed by 840 CodinGamers
0
done
Simple auto-scaling
by Kktus
Simple auto-scaling
XP
+50 XP
Completed by 702 CodinGamers
0
done
Detective Geek
by AdemDj12
Detective Geek
XP
+50 XP
Completed by 675 CodinGamers
0
done
IPv6 Shortener
by Toby75
IPv6 Shortener
XP
+50 XP
Completed by 663 CodinGamers
0
done
Faro shuffle
by qpi
Faro shuffle
XP
+50 XP
Completed by 567 CodinGamers
0
done
Rotating arrows
by Mortis_666
Rotating arrows
XP
+50 XP
Completed by 535 CodinGamers
0
done
Body weight is a girl's secret
by java_coffee_cup
Body weight is a girl's secret
XP
+50 XP
Completed by 516 CodinGamers
0
done
Low Resolution: What's The Shape?
by daifei4321
Low Resolution: What's The Shape?
XP
+50 XP
Completed by 509 CodinGamers
0
done
Someone's Acting Sus....
by SubwayMan
Someone's Acting Sus....
XP
+50 XP
Completed by 486 CodinGamers
0
done
Kangaroo words
by GamingGnawer
Kangaroo words
XP
+50 XP
Completed by 471 CodinGamers
0
done
|Build A Bookcase|🔨
by Lisa-Has-Ideas
|Build A Bookcase|🔨
XP
+50 XP
Completed by 445 CodinGamers
0
done
Panel count
by dolmen1234
Panel count
XP
+50 XP
Completed by 434 CodinGamers
0
done
FireControl
by Zxc
FireControl
XP
+50 XP
Completed by 404 CodinGamers
0
done
10 pin Bowling Scores
by TheCaptainCoder
10 pin Bowling Scores
XP
+50 XP
Completed by 397 CodinGamers
0
done
Scrabble score
by Remi.
Scrabble score
XP
+50 XP
Completed by 390 CodinGamers
0
done
Minesweeper level generator
by darkhorse64
Minesweeper level generator
XP
+50 XP
Completed by 373 CodinGamers
0
done
Another Road Construction Site - 1
by Trunksistor
Another Road Construction Site - 1
XP
+50 XP
Completed by 308 CodinGamers
0
done
Genetics and Computers
by Interstellar
Genetics and Computers
XP
+50 XP
Completed by 275 CodinGamers
0
done
Messed up mosaics
by Gautzilla
Messed up mosaics
XP
+50 XP
Completed by 275 CodinGamers
0
done
The leaking bathtub
by Tatur2000
The leaking bathtub
XP
+50 XP
Completed by 274 CodinGamers
0
done
Match DNA Sequence
by vivacit
Match DNA Sequence
XP
+50 XP
Completed by 265 CodinGamers
0
done
Fibonacci's Rabbit
by Diabetos
Fibonacci's Rabbit
XP
+50 XP
Completed by 262 CodinGamers
0
done
Compiler CG86 (Easy Version)
by abdelmathin
Compiler CG86 (Easy Version)
XP
+50 XP
Completed by 228 CodinGamers
0
done
Battle of Heroes
by Nick_Rimer
Battle of Heroes
XP
+50 XP
Completed by 209 CodinGamers
0
done
The Prime Twins - Part one
by Cyber-Kotik
The Prime Twins - Part one
XP
+50 XP
Completed by 193 CodinGamers
0
done
Where Was This Knight Before?
by Chris27
Where Was This Knight Before?
XP
+50 XP
Completed by 182 CodinGamers
0
done
Codongame
by Rafarafa
Codongame
XP
+50 XP
Completed by 175 CodinGamers
0
done
Tabloid Couple-Names 💕
by Lisa-Has-Ideas
Tabloid Couple-Names 💕
XP
+50 XP
Completed by 165 CodinGamers
0
done
The helpdesk
by jddingemanse
The helpdesk
XP
+50 XP
Completed by 158 CodinGamers
0
done
Item Maker
by ntu213
Item Maker
XP
+50 XP
Completed by 150 CodinGamers
0
done
Chinese Numbers
by Delicious31415
Chinese Numbers
XP
+50 XP
Completed by 144 CodinGamers
0
done
Shikaku Skill Builder
by Timinator
Shikaku Skill Builder
XP
+50 XP
Completed by 140 CodinGamers
0
done
Synchronized Scrambles
by somebuggy
Synchronized Scrambles
XP
+50 XP
Completed by 134 CodinGamers
0
done
Takuzu Solver (Easy mode)
by StepBack13
Takuzu Solver (Easy mode)
XP
+50 XP
Completed by 121 CodinGamers
0
done
Save my Drone!
by SR135
Save my Drone!
XP
+50 XP
Completed by 114 CodinGamers
0
done
Who is leading ?
by Edjy
Who is leading ?
XP
+50 XP
Completed by 108 CodinGamers
0
done
Scaleable TicTacToe
by hhgit
Scaleable TicTacToe
XP
+50 XP
Completed by 101 CodinGamers
0
done
Simple Diff Tool
by poppu
Simple Diff Tool
XP
+50 XP
Completed by 97 CodinGamers
0
done
Laughter is contagious
by Edjy
Laughter is contagious
XP
+50 XP
Completed by 46 CodinGamers
0
done
Custom Game of Life
by Edjy
Custom Game of Life
XP
+50 XP
Completed by 2,215 CodinGamers
0
done
Porcupine Fever
by Unihedron
Porcupine Fever
XP
+50 XP
Completed by 1,788 CodinGamers
0
done
Brackets, Extended Edition
by JBM
Brackets, Extended Edition
XP
+50 XP
Completed by 926 CodinGamers
0
done
Target Firing
by UnicornP
Target Firing
XP
+50 XP
Completed by 858 CodinGamers
0
done
Ways to make change
by lhm
Ways to make change
XP
+50 XP
Completed by 728 CodinGamers
0
done
Minesweeper
by VilBoub
Minesweeper
XP
+50 XP
Completed by 727 CodinGamers
0
done
Reversed Look-and-say
by elthaniel
Reversed Look-and-say
XP
+50 XP
Completed by 722 CodinGamers
0
done
Bulgarian solitaire
by cubomedusae
Bulgarian solitaire
XP
+50 XP
Completed by 678 CodinGamers
0
done
IP mask calculating
by Pyoroalb
IP mask calculating
XP
+50 XP
Completed by 662 CodinGamers
0
done
Code Breaker Puzzle
by Wontonimo
Code Breaker Puzzle
XP
+50 XP
Completed by 610 CodinGamers
0
done
Bingo!
by Yanahma
Bingo!
XP
+50 XP
Completed by 588 CodinGamers
0
done
Simplified Monopoly™ Turns Prediction
by Shoko84
Simplified Monopoly™ Turns Prediction
XP
+50 XP
Completed by 517 CodinGamers
0
done
Zhiwei Sun Squares
by DavidAugustoVilla
Zhiwei Sun Squares
XP
+50 XP
Completed by 513 CodinGamers
0
done
Forest Fire
by wolfalberto
Forest Fire
XP
+50 XP
Completed by 486 CodinGamers
0
done
Folding a Note
by P4V3L14K0V
Folding a Note
XP
+50 XP
Completed by 448 CodinGamers
0
done
No More Pythons, Please!
by VictoriousTriceraton
No More Pythons, Please!
XP
+50 XP
Completed by 373 CodinGamers
0
done
Kaprekar's routine
by code_of_the_dead
Kaprekar's routine
XP
+50 XP
Completed by 313 CodinGamers
0
done
Valid brackets in code
by Luj8n
Valid brackets in code
XP
+50 XP
Completed by 278 CodinGamers
0
done
Lost astronaut
by ATmax
Lost astronaut
XP
+50 XP
Completed by 252 CodinGamers
0
done
if then else
by java_coffee_cup
if then else
XP
+50 XP
Completed by 219 CodinGamers
0
done
Goldbach’s Conjecture
by WIlChrist
Goldbach’s Conjecture
XP
+50 XP
Completed by 216 CodinGamers
0
done
Constrained Latin Squares
by darkhorse64
Constrained Latin Squares
XP
+50 XP
Completed by 195 CodinGamers
0
done
🏐 🏖 Beach Volleyball 🏐 🏖
by Wontonimo
🏐 🏖 Beach Volleyball 🏐 🏖
XP
+50 XP
Completed by 136 CodinGamers
0
done
Thermal Flying - Episode 1
by sgalasso
Thermal Flying - Episode 1
XP
+50 XP
Completed by 131 CodinGamers
0
done
Self Checkout Machine
by Rob-G
Self Checkout Machine
XP
+50 XP
Completed by 131 CodinGamers
0
done
Various Number Spirals
by UasyaLyuty
Various Number Spirals
XP
+50 XP
Completed by 130 CodinGamers
0
done
Tennis score
by VilBoub
Tennis score
XP
+50 XP
Completed by 122 CodinGamers
0
done
Fractal Image Recognition
by Yegor_Biryukov
Fractal Image Recognition
XP
+50 XP
Completed by 109 CodinGamers
0
done
All Operations are Equal!
by tzaph
All Operations are Equal!
XP
+50 XP
Completed by 93 CodinGamers
0
done
BobTheScience and the Food Stack
by ZoinkVerifiesOrbit
BobTheScience and the Food Stack
XP
+50 XP
Completed by 77 CodinGamers
0
done
Team Building
by Andriamanitra
Team Building
XP
+50 XP
Completed by 63 CodinGamers
0
done
Networking
by Gladwell
Networking
XP
+50 XP
Completed by 55 CodinGamers
0
done
Frog Date
by NicknamedTwice
Frog Date
XP
+50 XP
Completed by 47 CodinGamers
0
done
Entanglement - Episode 1
by VizGhar
Entanglement - Episode 1
XP
+50 XP
Completed by 33 CodinGamers
0
done
N-dimensional maze
by Edjy
N-dimensional maze
XP
+50 XP
Completed by 28 CodinGamers
0
done
Polygon equilibrium
by Edjy
Polygon equilibrium
XP
+50 XP
Completed by 25 CodinGamers
0
done
n Queens
by VilBoub
n Queens
XP
+50 XP
Completed by 638 CodinGamers
0
done
Chess board analyzer
by Di_Masta
Chess board analyzer
XP
+50 XP
Completed by 487 CodinGamers
0
done
Dominoes solver
by VilBoub
Dominoes solver
XP
+50 XP
Completed by 189 CodinGamers
0
done
Dumbbells solver
by VilBoub
Dumbbells solver
XP
+50 XP
Completed by 183 CodinGamers
0
done
Hitori solver
by VilBoub
Hitori solver
XP
+50 XP
Completed by 161 CodinGamers
0
done
Surakarta
by pac-nam
Surakarta
XP
+50 XP
Completed by 144 CodinGamers
0
done
Divisibility of Fibonacci numbers sum
by OPi
Divisibility of Fibonacci numbers sum
XP
+50 XP
Completed by 120 CodinGamers
0
done
Pedestrian Traffic
by tobakudan
Pedestrian Traffic
XP
+50 XP
Completed by 33 CodinGamers
0
done
Advertisements
by jddingemanse
Advertisements
XP
+50 XP
Completed by 29 CodinGamers
0
done
Squares order
by VilBoub
Squares order
XP
+50 XP
Completed by 215 CodinGamers
0
done
ABOUT US
CAREERS
PRIVACY
FAQ
BLOG
ABOUT US
CAREERS
PRIVACY
FAQ
BLOG
The #1 tech hiring platform
SCREENING
INTERVIEWING
Facebook
YouTube
Twitter
LinkedIn
FR
EN