Set of integers symbol.
The capital Latin letter Z is used in mathematics to represent the set of integers. Usually, the letter is presented with a "double-struck" typeface to indicate that it is the set of integers.
Set of natural numbers.
The set of rational numbers is denoted with the Latin Capital letter Q presented in a double-struck type face.
The set of real numbers symbol is a Latin capital R presented in double-struck typeface.
The set of complex numbers is represented by the Latin capital letter C. The symbol is often presented with a double-struck font face just as with other number sets. The set of complex numbers extends the real numbers.
The set of integers is made up of the set of counting integers and each of their negative counter parts.