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Verilog Numbers Specification

The numbers in Verilog can be sized, or unsized. Along with that, as we know Verilog is an HDL (Hardware descriptive language) So it must be able to describe the two common values appearing in digital circuits. These two are “unknown value” and “high impedance state”. Apart from that, numbers can take negative values too. The complete specification of number system in Verilog is given below: