Reinforcing the gist of Post #12VHDL / verilog are hardware description languages. ( HDL ) , a "Register Transfer Language" ( RTL )
They are used to describe without ambiguity the digital structure you require.
The RTL can then be simulated, to check it performs the actions you want in your hardware logic,
the can be used to synthesise silicon, be that as ASIC or more likely as FPGA .