for loop step part is mandatory in verilog(note: optional in Systemverilog)
时间: 2024-04-30 11:20:08 浏览: 9
You are correct. In Verilog, the `step` part of a `for` loop is mandatory, whereas in SystemVerilog, it is optional.
In Verilog, the syntax for a `for` loop is as follows:
```
for (initialization; condition; step) begin
// statements to be executed
end
```
Here, the `step` part specifies the increment/decrement of the loop variable. If the `step` part is omitted, then the loop variable will not change, resulting in an infinite loop.
In SystemVerilog, the `step` part is optional. If it is omitted, the loop variable is incremented/decremented by 1 by default. Here is an example:
```
for (int i=0; i<5; ) begin // step part is omitted
$display("i = %d", i);
i++; // increment by default
end
```
This code will produce the output:
```
i = 0
i = 1
i = 2
i = 3
i = 4
```