The number which we use for counting are known as
Counting numbers (also called whole number or natural numbers) are those used to count physical objects in the real world, such as
They are integers that can be zero or positive. They assume that the things being counted are not divisible. So we can have 4 cars, but never 3½ cars.
They are not negative because, when counting things in the real world, the notion of having less than none of them makes no sense. Zero is commonly accepted as one of the counting numbers, but there is no complete agreement about this.
Formally, counting numbers are the set of all non-negative integer.
Counting numbers are also called cardinal number.