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Even or Odd Numbers

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.

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Even or Odd Numbers -

Tag(s) : Data processing, Mathematics

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Even or Odd Numbers

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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. 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")

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