Registers, integers and time data types can be declared as arrays, as shown in the example below. Note the size of the array comes after the variable name in the declaration and after the variable name but before the bit reference in an assignment. So :-

declaration: <data_type_spec> {size} <variable_name> {array_size}

reference: <variable_name> {array_reference} {bit_reference}

        reg data [7:0]; // 8 1-bit data elements
        integer [3:0] out [31:0]; // 32 4-bit output elements

        data[5]; // referencing the 5th data element