Decimals are not considered integers. Integers are the set of whole numbers that includes zero as well as all positive whole numbers and their negatives. Decimals are numbers that have decimal fractions written to the right of a decimal point.
Decimal fractions have denominators that are 10 or a power of 10. For example, the decimal 4.75 is not a whole number because it means four and 75/100. Since it is not a whole number, it is not an integer. However, decimals do belong to the set of rational numbers, which in addition to decimals also includes fractions and integers.