Understand Integer Definition: Step 1: Understand the definition of an integer. Integers are whole numbers without any fractional or decimal parts.
Examine Number 5.18: Step 2: Examine the number 5.18. 5.18 has a decimal part, which is .18.
Determine if 5.18 is an Integer: Step 3: Determine if 5.18 qualifies as an integer. Since 5.18 has a decimal part, it is not a whole number and therefore not an integer.