menu_book Course Curriculum (Verilog) expand_more
test vector loop
Learn test vector loop in Verilog through a focused explanation, a dedicated construct-specific example, an engineering boundary, and a mastery check.
test vector loop is an atomic Verilog topic inside Testbenches. This lesson focuses on how the test vector loop construct is written, what it changes, and when it is the right tool.
Trace the example line by line. Identify the exact syntax for test vector loop, the input state before it runs, and the resulting value, control flow, database state, hardware behavior, or runtime effect afterward. Neighboring lessons use different constructs rather than renamed copies of this one.
Topic-specific example
initial for(int i=0;i<4;i++) begin {a,b}=i; #1 $display("%b %b -> %b",a,b,y); end
For test vector loop, test the boundary that belongs to this exact feature rather than a generic failure case. Check invalid or empty input, NULL/unknown state, numeric limits, transaction or exception behavior, synthesis/runtime constraints, ownership/permission rules, or backtracking/control-flow effects where they apply.