A whole number is either a counting number or zero (0).

A natural number is a counting number. It starts from 1 onwards.

A rational number is a number that can be written as a ratio of two integers. It can be a fraction, an integer, a whole number, or even a natural number.

A real number is a number that can be found on the number line.

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• This reply was modified 4 months ago by  Radhika Gupta.