z
Symbol  Format  Data 

z  Code Point 
U+007A 
TeX 
z 

SVG 
The Latin letter z is used to represent a variable or coefficient. The symbol z is also used to represent the up/down dimension in the 3D cartesian coordinate system.
The capital Latin letter Z is used in mathematics to represent the set of integers. Usually, the letter is presented with a "doublestruck" typeface to indicate that it is the set of integers.