Tool to automatically detect the parity of a list of numbers. The parity of a number is the property that to be (or not to be) a multiple of two. An integer multiple of 2 is an even integer, the others are odd integers.

dCode is free and its tools are a valuable help in games, maths, geocaching, puzzles and problems to solve every day! A suggestion ? a feedback ? a bug ? an idea ? Write to dCode!

Tool to automatically detect the parity of a list of numbers. The parity of a number is the property that to be (or not to be) a multiple of two. An integer multiple of 2 is an even integer, the others are odd integers.

Answers to Questions

How to check if a number is even?

A number is even if it is a multiple of $ 2 $ (two). A number is multiple of $ 2 $ if it has $ 2 $ as divisor. A number has $ 2 $ as a divisor if the remainder of the division by $ 2 $ is $ 0 $ (ie the result is an integer and not a floating point number).

Example: $ 12 $ is even because $ 12 / 2 = 6 $ (integer)

Example: $ 123 $ is odd because $ 123 / 2 = 61.5 $ (not integer)

The multiples of $ 2 $ end with 0, 2, 4, 6 or 8. Check if a number is multiple of $ 2 $ can thus be realized quickly by looking at the last digit of the number.

What is the modulo 2 calculation?

The calculation modulo 2 (noted %2) is widespread in computing to check the parity of a number. The calculation returns 1=true if the number is odd and 0=false if the number is even.

Example: 1234%2=0 therefore 1234 is even

How to check a number parity in Excel?

Excel has a function ISODD(), else there is a formula =IF(MOD(A1,2),"odd","even")

Source code

dCode retains ownership of the source code of the script Even or Odd Numbers online. Except explicit open source licence (indicated Creative Commons / free), any algorithm, applet, snippet, software (converter, solver, encryption / decryption, encoding / decoding, ciphering / deciphering, translator), or any function (convert, solve, decrypt, encrypt, decipher, cipher, decode, code, translate) written in any informatic langauge (PHP, Java, C#, Python, Javascript, Matlab, etc.) which dCode owns rights will not be released for free. To download the online Even or Odd Numbers script for offline use on PC, iPhone or Android, ask for price quote on contact page !