Intergers are whole numbers but they exclude all fractional components. Integers also includes negative numbers. Base on the question given below all the other option has fractional component except for square root 9.
[tex]\begin{gathered} \sqrt{5}=2.23(it\text{ is a decimal)} \\ \sqrt{9}\text{ = 3 it is an integer} \\ \frac{1}{3}\text{ is a fraction} \\ 0.8\text{ has a decimal so it is not an integer} \end{gathered}[/tex]
