A range is a sequence of numbers or arithmetic expressions that define the width of a group (bus). A range is enclosed in brackets; the MSB of the range is shown first; the LSB is shown last. The start and end of the range are separated by two periods in the Block Editor and in AHDL, and by a colon in Verilog HDL.
Example: group a[2..0] consists of the nodes a2, a1, and a0; the MSB is a2; and the LSB is a0.