Programming Challenges

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

Challenges

Miscellaneous
- 419
  votes Palindrome String
- 362
  votes Is Binary or not
- 320
  votes number to string format
- 309
  votes Convert to uppercase
- 290
  votes Matrix Multiplication
- 279
  votes Quadrant of an Angle
- 268
  votes Print Rectangle
- 267
  votes Name search
- 265
  votes Sum of the digits
- 263
  votes Statement reverse
- 262
  votes Decimal to Octal Conversion
- 249
  votes Pascal Triangle
- 245
  votes String Sort
- 241
  votes Count Ones
- 240
  votes Sum of Naturals divisible by 3 and 5
- 240
  votes Number Occurrence in Array
- 239
  votes Leap Year check
- 239
  votes Average of positive and negative numbers
- 232
  votes Reverse Array
- 231
  votes Flow Control
- 230
  votes Last Samples of a number
- 227
  votes Compare Numbers
- 227
  votes Word Reverse
- 226
  votes Convert in Seconds
- 226
  votes triangular star
- 225
  votes Sexy Pairs
- 223
  votes Transpose of Matrix
- 222
  votes Wind Chill
- 222
  votes Operators
- 220
  votes Number of occurence
- 219
  votes date sort
- 213
  votes Fibonacci Series
- 212
  votes sum of column of a matrix
- 209
  votes Diamond Shape
- 208
  votes Factorial of a given number
- 205
  votes Armstrong Number
- 203
  votes Capitalization
- 203
  votes Arrays and Collections
- 202
  votes Amicable Total
- 202
  votes Cartesian to Polar co-ordinates
- 200
  votes print even numbers using forloop
- 199
  votes Spring month check
- 199
  votes Nested for loops
- 199
  votes Decimal to binary covertor
- 199
  votes ISBN Validation
- 199
  votes Reciprocals Sum average and Product
- 198
  votes Reverse Floyds Triangle
- 197
  votes Arithmetic Demonstration
- 194
  votes Triangular Numbers
- 194
  votes Find Vowels and Consonants
- 189
  votes Perfect number
- 188
  votes Count Occurrence of Character in string
- 185
  votes Consecutive number
- 183
  votes Exception Handling
- 183
  votes Switch-Case
- 182
  votes Sort Three numbers
- 179
  votes Sum of Odd Numbers
- 179
  votes Find Day of Given Date
- 177
  votes Euclids GCD Algorithm
- 177
  votes Multiplication Table
- 177
  votes Indian rupees formatter
- 176
  votes Print Binary Triangle
- 175
  votes Convert binary to decimal
- 173
  votes Collatz Sequence
- 172
  votes Permutation of Strings
- 171
  votes Ulam Sequence
- 163
  votes Remove Character
- 161
  votes Prime Factors
- 156
  votes Gray Code
- 153
  votes Name search
- 153
  votes Method for finding maximum number amongst three
- 152
  votes Print traingle of * using loops
- 145
  votes Find Maximum and Minimum Temperature
- 140
  votes Abundant Numbers
- 134
  votes While loop test
- 130
  votes Number Sequence
- 123
  votes TrimSpace
- 60
  votes First Day
- 56
  votes Sum of the digits of the product of numbers from 1 to n.
- 29
  votes Add the strings
Collections
- 8
  votes Getting the Largest Value in an ArrayList
- 3
  votes Stack
- 1
  votes Locating the Largest Value in an ArrayList
- -3
  votes Copying ArrayLists
- -6
  votes Find length of the longest String in ArrayList
Polymorphism
- 95
  votes Constructor overloading
- 79
  votes Overloading example
- 54
  votes Overriding example
- 12
  votes Books
- 4
  votes Area of Shapes
Exception Handling
- 52
  votes ID Number Machine
- 43
  votes Ask for certain number
- 2
  votes slopePoint
- -3
  votes Catch the Fish Again...!!
- -4
  votes Convert to centimeters
Inheritance
- 404
  votes Counter - inheritance
- 76
  votes Area of a circle using inheritance
- 7
  votes Method Overriding
- 5
  votes PurchasedItem
- 5
  votes Use Super
Classes
- 317
  votes Print using toString
- 32
  votes Author class
- 25
  votes Circle class
- 10
  votes Employee class
- 5
  votes Date Class
- 5
  votes Quadrant Point
- 3
  votes Flip point
- 1
  votes Area and Perimeter using Interfaces!
Strings
- 360
  votes Changing Uppercase to Lowercase
- 328
  votes Find length of the string
- 283
  votes Capitalization
- 200
  votes Longest Word
- 200
  votes Palindrome Check
- 179
  votes Change Case
- 126
  votes String Manipulations
- 123
  votes Username
- 71
  votes Remove vowels from a Word
- 45
  votes Toggle String
- 34
  votes First half with second half
- 8
  votes Bob There?
- 7
  votes Decode URL!
- 5
  votes doublex
- 5
  votes List Letters
- 4
  votes Has Bad
- 4
  votes ComboString
- 4
  votes Find Triplets
- 4
  votes stringTimes
- 3
  votes Replacer
- 3
  votes maxBlock
- 3
  votes Romans Numbers to Arabic!
- 3
  votes First Two
- 3
  votes Substring Checker
- 3
  votes Rotate left by two
- 2
  votes End Up
- 2
  votes SumNumber
- 2
  votes stringSplosion
- 2
  votes compareTo() Challenge
- 2
  votes Word Count!
- 2
  votes altPair
- 1
  votes SumNumber .....it's different
- 0
  votes notReplace
- 0
  votes Is it equal or Not???
- -2
  votes Front Again
Arrays
- 290
  votes Reverse a String using array
- 201
  votes Add elements of an Array
- 151
  votes Product of greatest and Smallest
- 44
  votes Even numbers only
- 38
  votes Swapping elements
- 10
  votes tripleUp
- 10
  votes Swap ends
- 6
  votes Back-array-thon
- 5
  votes Count Clumps
- 3
  votes Locate The Largest In The Array!
- 3
  votes Poke Trade
- -11
  votes Average Score
- -13
  votes Poke Trade 2
Methods
- 360
  votes Square root of a number
- 256
  votes Area of a circle
- 73
  votes Multiple or not
- 70
  votes Convert upper to lower case
- 38
  votes Arithmetic Operations
- 12
  votes Watch a Movie Now
- 11
  votes Cigar Party
- 10
  votes MixString
- 9
  votes Share Digit
- 6
  votes Find the car model
- 5
  votes anglePairs
- 4
  votes Prime number challenge
- -1
  votes The Keychains Shop!
- -17
  votes Keychains for Sale, for real this time
Loops
- 423
  votes Sum of Prime Digits in a Number
- 281
  votes Counting the number of a's.
- 227
  votes Printing a box of #s
- 157
  votes Sum of 5 integers
- 130
  votes Binary to decimal
- 109
  votes Reverse a Number
- 88
  votes Dynamic adding
- 58
  votes Table
- 57
  votes Factorial value
- 37
  votes Login
- 13
  votes Do You Know The Pin??
- 13
  votes Add Up The Inputs!
- 12
  votes Printing a checkerboard
- 12
  votes Test Palindromic Word
- 10
  votes Extracting Digits
- 9
  votes A New Hope
- 9
  votes Collatz Sequence
- 9
  votes Armstrong Numbers
- 7
  votes Counting Machine
- 6
  votes Binary
Flow Control
- 317
  votes No multiples of 3,4
- 40
  votes Right or Wrong
- 24
  votes Space Boxing
- 19
  votes Lucky Sum
- 17
  votes Red lottery Ticket
- 14
  votes Devry Admission Program
- 13
  votes Sleep
- 10
  votes Date Fashion
- 10
  votes Evenly Spaced
- 9
  votes Picture Menu
Arithmetic
- 255
  votes Absolute Equals
- 63
  votes Floor and Ceiling of Number
- 41
  votes Square root, Quadratic root?
- 18
  votes Taylor series to find sine()
- 15
  votes Denominations!
- 14
  votes Sum Limit
- 12
  votes sum of multiples of 3 or 5 below a number
- 11
  votes Octal to Decimal
- 6
  votes Hex2Dec
Operators
- 364
  votes Arithmetic Operators
- 274
  votes Degree to Fahrenheit converter
- 190
  votes Arithmetic Operators
- 30
  votes Largest of three numbers
- 25
  votes Find Simple Interest
- 24
  votes Leap year
Variables
- 664
  votes Multiply any two numbers
- 576
  votes Even or Odd
- 525
  votes Declaring Variables
- 172
  votes Variable Max Values
- 109
  votes Testing your variable knowledge...
- 90
  votes Prime number - Checker
- 42
  votes Name, Age, and Salary
- 42
  votes Area of Triangle
- -95
  votes More User Input of Data