Programmr's Coding Challenges
Sharpen your coding skills in the most entertaining way by solving Programmr's coding challenges!
Don't forget to challenge your friends too!
Java

Palindrome String418votes 
Is Binary or not362votes 
number to string format320votes 
Convert to uppercase309votes 
Matrix Multiplication290votes 
Quadrant of an Angle279votes 
Print Rectangle268votes 
Name search267votes 
Sum of the digits265votes 
Statement reverse263votes 
Decimal to Octal Conversion262votes 
Pascal Triangle249votes 
String Sort245votes 
Count Ones241votes 
Sum of Naturals divisible by 3 and 5240votes 
Number Occurrence in Array240votes 
Average of positive and negative numbers239votes 
Leap Year check239votes 
Reverse Array232votes 
Flow Control231votes 
Last Samples of a number230votes 
Compare Numbers227votes 
Word Reverse227votes 
triangular star226votes 
Convert in Seconds226votes 
Sexy Pairs225votes 
Transpose of Matrix223votes 
Wind Chill222votes 
Operators222votes 
Number of occurence220votes 
date sort219votes 
Fibonacci Series213votes 
sum of column of a matrix212votes 
Diamond Shape209votes 
Factorial of a given number208votes 
Armstrong Number205votes 
Capitalization203votes 
Arrays and Collections203votes 
Cartesian to Polar coordinates202votes 
Amicable Total202votes 
print even numbers using forloop200votes 
Nested for loops199votes 
Decimal to binary covertor199votes 
ISBN Validation199votes 
Reciprocals Sum average and Product199votes 
Spring month check199votes 
Reverse Floyds Triangle198votes 
Arithmetic Demonstration197votes 
Triangular Numbers194votes 
Find Vowels and Consonants194votes 
Perfect number189votes 
Count Occurrence of Character in string188votes 
Consecutive number185votes 
Exception Handling183votes 
SwitchCase183votes 
Sort Three numbers182votes 
Find Day of Given Date179votes 
Sum of Odd Numbers179votes 
Euclids GCD Algorithm177votes 
Multiplication Table177votes 
Indian rupees formatter177votes 
Print Binary Triangle176votes 
Convert binary to decimal175votes 
Collatz Sequence172votes 
Permutation of Strings172votes 
Ulam Sequence171votes 
Remove Character163votes 
Prime Factors161votes 
Gray Code156votes 
Method for finding maximum number amongst three153votes 
Name search153votes 
Print traingle of * using loops152votes 
Find Maximum and Minimum Temperature145votes 
Abundant Numbers140votes 
While loop test134votes 
Number Sequence130votes 
TrimSpace123votes 
First Day60votes 
Sum of the digits of the product of numbers from 1 to n.56votes 
Add the strings29votes


Getting the Largest Value in an ArrayList8votes 
Stack3votes 
Locating the Largest Value in an ArrayList1votes 
Copying ArrayLists4votes 
Find length of the longest String in ArrayList6votes


Constructor overloading95votes 
Overloading example79votes 
Overriding example54votes 
Books12votes 
Area of Shapes5votes


ID Number Machine52votes 
Ask for certain number43votes 
slopePoint2votes 
Catch the Fish Again...!!3votes 
Convert to centimeters4votes


Counter  inheritance404votes 
Area of a circle using inheritance76votes 
Method Overriding7votes 
PurchasedItem5votes 
Use Super5votes


Print using toString317votes 
Author class32votes 
Circle class25votes 
Employee class10votes 
Date Class5votes 
Quadrant Point5votes 
Flip point3votes 
Area and Perimeter using Interfaces!1votes


Changing Uppercase to Lowercase360votes 
Find length of the string328votes 
Capitalization283votes 
Palindrome Check200votes 
Longest Word200votes 
Change Case179votes 
String Manipulations126votes 
Username123votes 
Remove vowels from a Word71votes 
Toggle String45votes 
First half with second half34votes 
Bob There?8votes 
Decode URL!7votes 
doublex5votes 
List Letters5votes 
Find Triplets4votes 
stringTimes4votes 
Has Bad4votes 
ComboString4votes 
Romans Numbers to Arabic!3votes 
First Two3votes 
Substring Checker3votes 
Rotate left by two3votes 
Replacer3votes 
maxBlock3votes 
stringSplosion2votes 
compareTo() Challenge2votes 
Word Count!2votes 
altPair2votes 
End Up2votes 
SumNumber2votes 
SumNumber .....it's different1votes 
notReplace0votes 
Is it equal or Not???0votes 
Front Again2votes


Reverse a String using array290votes 
Add elements of an Array201votes 
Product of greatest and Smallest151votes 
Even numbers only44votes 
Swapping elements38votes 
tripleUp10votes 
Swap ends10votes 
Backarraython6votes 
Count Clumps5votes 
Locate The Largest In The Array!3votes 
Poke Trade3votes 
Average Score10votes 
Poke Trade 213votes


Square root of a number360votes 
Area of a circle256votes 
Multiple or not73votes 
Convert upper to lower case70votes 
Arithmetic Operations38votes 
Watch a Movie Now12votes 
Cigar Party11votes 
MixString10votes 
Share Digit9votes 
Find the car model6votes 
anglePairs5votes 
Prime number challenge4votes 
The Keychains Shop!1votes 
Keychains for Sale, for real this time17votes


Sum of Prime Digits in a Number423votes 
Counting the number of a's.281votes 
Printing a box of #s227votes 
Sum of 5 integers157votes 
Binary to decimal130votes 
Reverse a Number109votes 
Dynamic adding88votes 
Table58votes 
Factorial value57votes 
Login37votes 
Do You Know The Pin??13votes 
Add Up The Inputs!13votes 
Printing a checkerboard12votes 
Test Palindromic Word12votes 
Extracting Digits10votes 
Armstrong Numbers9votes 
A New Hope9votes 
Collatz Sequence9votes 
Counting Machine7votes 
Binary6votes


No multiples of 3,4317votes 
Right or Wrong40votes 
Space Boxing24votes 
Lucky Sum19votes 
Red lottery Ticket17votes 
Devry Admission Program14votes 
Sleep13votes 
Date Fashion10votes 
Evenly Spaced10votes 
Picture Menu9votes


Absolute Equals255votes 
Floor and Ceiling of Number63votes 
Square root, Quadratic root?41votes 
Taylor series to find sine()18votes 
Denominations!15votes 
Sum Limit14votes 
sum of multiples of 3 or 5 below a number12votes 
Octal to Decimal11votes 
Hex2Dec6votes


Arithmetic Operators364votes 
Degree to Fahrenheit converter274votes 
Arithmetic Operators190votes 
Largest of three numbers30votes 
Find Simple Interest25votes 
Leap year24votes


Multiply any two numbers664votes 
Even or Odd576votes 
Declaring Variables525votes 
Variable Max Values172votes 
Testing your variable knowledge...109votes 
Prime number  Checker90votes 
Area of Triangle42votes 
Name, Age, and Salary42votes 
More User Input of Data94votes
