subratam99 wrote:

Is an even number always integer ?

In one of the DS question I have noticed that X is mentioned as even number.

And then all argument starts with X is even but It may or may not be an integer.

I think an even number is always integer whether it is mentioned explicitly.

Yes, you are right: only integers can be even or odd.

An even number is an

integer that is "evenly divisible" by 2, i.e., divisible by 2 without a remainder.

An even number is an

integer of the form \(n=2k\), where \(k\) is an integer.

An odd number is an

integer that is not evenly divisible by 2.

An odd number is an

integer of the form \(n=2k+1\), where \(k\) is an integer.