Yes, 35 is a whole number. Whole numbers are defined as the set of non-negative integers which include 0, 1, 2, 3, and so on, without any fractions or decimals. Since 35 is a positive integer and fits within this definition, it qualifies as a whole number.
In mathematics, whole numbers are important because they provide a basis for various calculations and are commonly used in counting and ordering. Unlike negative numbers or fractional values, whole numbers are straightforward and intuitive, making them easy to understand and work with in everyday situations.