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 String366votes 
Is Binary or not333votes 
number to string format302votes 
Convert to uppercase291votes 
Matrix Multiplication280votes 
Quadrant of an Angle266votes 
Name search262votes 
Print Rectangle261votes 
Statement reverse260votes 
Decimal to Octal Conversion258votes 
Sum of the digits251votes 
Count Ones245votes 
Pascal Triangle243votes 
String Sort240votes 
Sum of Naturals divisible by 3 and 5236votes 
Number Occurrence in Array236votes 
Average of positive and negative numbers235votes 
Leap Year check234votes 
Reverse Triangle230votes 
Reverse Array229votes 
Flow Control227votes 
Last Samples of a number225votes 
Word Reverse224votes 
Compare Numbers224votes 
Convert in Seconds222votes 
Transpose of Matrix221votes 
Wind Chill221votes 
Sexy Pairs219votes 
date sort217votes 
Operators217votes 
Number of occurence216votes 
Fibonacci Series210votes 
sum of column of a matrix209votes 
Diamond Shape206votes 
Factorial of a given number206votes 
Armstrong Number203votes 
Amicable Total203votes 
Cartesian to Polar coordinates202votes 
Arrays and Collections202votes 
Reciprocals Sum average and Product200votes 
Capitalization199votes 
Decimal to binary covertor198votes 
ISBN Validation197votes 
Reverse Floyds Triangle197votes 
Spring month check197votes 
Nested for loops196votes 
print even numbers using forloop196votes 
Arithmetic Demonstration196votes 
Triangular Numbers195votes 
Find Vowels and Consonants192votes 
Count Occurrence of Character in string190votes 
Perfect number186votes 
Consecutive number184votes 
Exception Handling183votes 
SwitchCase182votes 
Sort Three numbers181votes 
Find Day of Given Date179votes 
Euclids GCD Algorithm177votes 
Indian rupees formatter177votes 
Print Binary Triangle176votes 
Sum of Odd Numbers175votes 
Convert binary to decimal174votes 
Multiplication Table174votes 
Permutation of Strings173votes 
Ulam Sequence172votes 
Collatz Sequence169votes 
Remove Character162votes 
Prime Factors160votes 
Gray Code155votes 
Name search153votes 
Print traingle of * using loops152votes 
Method for finding maximum number amongst three152votes 
Find Maximum and Minimum Temperature146votes 
Abundant Numbers140votes 
While loop test134votes 
Number Sequence130votes 
TrimSpace122votes 
First Day60votes 
Sum of the digits of the product of numbers from 1 to n.52votes 
Add the strings29votes


Getting the Largest Value in an ArrayList8votes 
Stack3votes 
Locating the Largest Value in an ArrayList1votes 
Find length of the longest String in ArrayList3votes 
Copying ArrayLists3votes


Constructor overloading92votes 
Overloading example78votes 
Overriding example52votes 
Area of Shapes5votes 
Books4votes


ID Number Machine50votes 
Ask for certain number42votes 
slopePoint1votes 
Catch the Fish Again...!!2votes 
Convert to centimeters3votes


Counter  inheritance402votes 
Area of a circle using inheritance76votes 
Use Super5votes 
PurchasedItem4votes 
Method Overriding4votes


Print using toString315votes 
Author class30votes 
Circle class23votes 
Employee class10votes 
Date Class6votes 
Quadrant Point5votes 
Area and Perimeter using Interfaces!3votes 
Flip point3votes


Changing Uppercase to Lowercase359votes 
Find length of the string327votes 
Capitalization283votes 
Longest Word201votes 
Palindrome Check200votes 
Change Case177votes 
String Manipulations126votes 
Username122votes 
Remove vowels from a Word69votes 
Toggle String45votes 
First half with second half34votes 
Bob There?8votes 
Decode URL!7votes 
List Letters6votes 
doublex5votes 
Has Bad4votes 
ComboString4votes 
Find Triplets4votes 
stringTimes4votes 
Rotate left by two3votes 
maxBlock3votes 
SumNumber3votes 
First Two3votes 
Substring Checker3votes 
Replacer2votes 
End Up2votes 
stringSplosion2votes 
compareTo() Challenge2votes 
Word Count!2votes 
altPair2votes 
SumNumber .....it's different1votes 
Is it equal or Not???1votes 
Romans Numbers to Arabic!0votes 
notReplace0votes 
Front Again1votes


Reverse a String using array288votes 
Add elements of an Array200votes 
Product of greatest and Smallest150votes 
Even numbers only41votes 
Swapping elements38votes 
Swap ends11votes 
tripleUp9votes 
Count Clumps6votes 
Backarraython6votes 
Locate The Largest In The Array!3votes 
Poke Trade3votes 
Poke Trade 29votes 
Average Score9votes


Square root of a number360votes 
Area of a circle254votes 
Multiple or not72votes 
Convert upper to lower case70votes 
Arithmetic Operations38votes 
Cigar Party12votes 
Watch a Movie Now11votes 
MixString10votes 
Share Digit8votes 
anglePairs5votes 
Prime number challenge4votes 
Find the car model4votes 
The Keychains Shop!1votes 
Keychains for Sale, for real this time16votes


Sum of Prime Digits in a Number421votes 
Counting the number of a's.280votes 
Printing a box of #s227votes 
Sum of 5 integers156votes 
Binary to decimal130votes 
Reverse a Number109votes 
Dynamic adding89votes 
Table58votes 
Factorial value57votes 
Login36votes 
Add Up The Inputs!13votes 
Do You Know The Pin??13votes 
Test Palindromic Word12votes 
Printing a checkerboard11votes 
Extracting Digits10votes 
Collatz Sequence9votes 
Armstrong Numbers9votes 
Counting Machine8votes 
A New Hope7votes 
Binary6votes


No multiples of 3,4316votes 
Right or Wrong41votes 
Space Boxing23votes 
Lucky Sum19votes 
Red lottery Ticket17votes 
Devry Admission Program14votes 
Sleep13votes 
Date Fashion10votes 
Evenly Spaced10votes 
Picture Menu9votes


Absolute Equals255votes 
Floor and Ceiling of Number62votes 
Square root, Quadratic root?41votes 
Taylor series to find sine()21votes 
Denominations!15votes 
Sum Limit14votes 
sum of multiples of 3 or 5 below a number12votes 
Octal to Decimal11votes 
Hex2Dec7votes


Arithmetic Operators362votes 
Degree to Fahrenheit converter274votes 
Arithmetic Operators190votes 
Largest of three numbers28votes 
Find Simple Interest25votes 
Leap year24votes


Multiply any two numbers657votes 
Even or Odd574votes 
Declaring Variables524votes 
Variable Max Values172votes 
Testing your variable knowledge...105votes 
Prime number  Checker87votes 
Name, Age, and Salary41votes 
Area of Triangle40votes 
More User Input of Data79votes
