Is 21 an Integer?

Integer Question: Is 21 an Integer?

For 21 to be an integer, 21 has to be a whole number. Furthermore, for 21 to be an integer, you should be able to write 21 without a fractional or decimal component.

21 is a whole number that can be written without a fractional component, thus 21 is an integer.

The answer to the question: "Is 21 an integer?" is YES.

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