Yes. Just that everything past the decimal must be all zeroes.
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Any number that has non-zero digits after the decimal point is NOT an integer.
A decimal number is not an integer. An integer is a number that is not a fraction, and decimal numbers are decimal fractions.
Well, honey, an integer is a whole number that can be positive, negative, or zero. Since 1.25 has a decimal point and some digits after it, it's actually a decimal number, not an integer. So, in short, 1.25 is not an integer, it's more like a fancy fraction.
It can, since 0.999...=1. Therefore zero point nine repeating is an integer. Other repeating-decimal integers are 1.999..., 2.999...., -1.999..., etc.
It the power is d, where d is a signed integer, the decimal point moves d place to the right.