Dynamic Array- System Verilog

[akashrm_07]

Doubt 1: Even though without creating a memory the array is taking the value, then what is the point of dynamic array?

Ref. to Doubt 1:

module ex;
int x [ ];
initial begin

//Here i am not creating the memory
$display(“size=%0d”,x.size());
x = '{1,2,3,4,5,6,7};
$display(“x=%p”,x);
$display(“size=%0d”,x.size());
end
endmodule

Doubt 2: While assigning the elements to the array, here I had created the size 3 and assign some 7 elements, and its working.

But, after assigning the value using foreach loop, and the if i try to assign to the out of bound value then it is displaying 0.

Ref. to Doubt 2:

module ex;
int x [ ];
initial begin

x=new[3]                                   //Size =3
$display(“size=%0d”,x.size());
x = '{1,2,3,4,5,6,7};                 // assigning more elements greater than the size
$display(“x=%p”,x);
$display(“size=%0d”,x.size());
end
endmodule

[dave_59]

The code in your first question doesn’t match the output you provided. It matches the code in the second question. Additionally, the code in the second question doesn’t contain a foreach loop.

In any case, whenever you copy an entire aggregate array to a dynamic array, there’s no need to construct (call new[n]) beforehand. The previous contents of the array are deleted and replaced with the right-hand side of the assignment. You would only call the constructor first if your intention was to access elements individually.

Once you’ve constructed a dynamic array, it behaves similarly to any other array when accessing individual elements. Accessing out-of-bounds indexes doesn’t do anything, and reads return the default value for the element type.