Yes, every integer is also a rational number. A rational number is defined as any number that can be expressed as the quotient of two integers, where the denominator is not zero.
For an integer \( n \), it can be expressed as \( \frac{n}{1} \). Since both \( n \) (the numerator) and \( 1 \) (the denominator) are integers and the denominator is not zero, every integer qualifies as a rational number.