Why we need x and z values since our chip will work with only 0's and 1's?

SystemVerilog
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why we need x and z values since our chip will work with only 0’s and 1’s?

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In reply to rohit_kumar:

There are many other chips that use the Z-state (try-state or undriven strength) either internally or at the boundary I/O pads, as well as the board or system level.

The X state is used in simulation to represent the un-initialized state of a register, or the result of an error, like a timing violation.

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Hi Dave,
Thank you for the answer,

But in real time , i don’t think we will encounter the X state and Z state, please correct me if i am wrong and clarify for same.

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In reply to rohit_kumar:

You need to explain what caused your concern about X and Z states in the first place. Why do you think someone needs them?

A real design chip has no 0 and 1 state either, only analog voltages and currents. 0,1,x and z “states” are all HDL language based concepts.

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rite , basic thing i forgot. Thank you for making me remind. :)

Thank you Dave.