A short is a 16-bit data-type.
This yields a range of -32,768 to 32,767 (minimum value of -2^15 and a maximum value of (2^15) - 1).
var - your short variable name
val - the value you assign to that variablebyte
int
unsigned int
short ledPin = 13;
short var = val;
var - your short variable name
val - the value you assign to that variable