Negative Numbers in Verilog

A negative number can be expressed in verilog by putting a negative sign before that number. But it is invalid to put a sign after the base format. See the example below for clarification.

Example of a negative number in Verilog:

z = - 14’ha345;      // the value is stored as a 2’s complement

Important Note: The negation can be assigned only to a constant. The number is stored as a 2’s complement.