Assign

assign declaration can assign expression to variable. assign declarations are treated as combinational logic. See Execution Model for evaluation semantics.

module ModuleA {
    var a: logic<10>;

    assign a = 1;
}

Concatenation can be used as the left hand side of assign declaration.

module ModuleA {
    var a: logic<10>;
    var b: logic<10>;

    assign {a, b} = 1;
}