The set of whole numbers also does not satisfy all our requirements as on observation, we find that it does not include negative numbers like -2, -7 and so on. To overcome this shortcoming, a set of elements called Integers had been constituted. This set is denoted by the symbol 'I'. It is represented as:

I = {.....-3, -2, -1, 0, 1, 2, 3,.........}

This set is definitely superior to natural and whole numbers in the sense that it caters to a larger audience as compared to the other number systems