How to add an int array in a protobuf message

Question

I have to compose a protobuf message which should have 1 integer variables and a integer array.

package protobuf;  message myProto {  optional uint32 message_id =1; optional int update = 2; //here I have to add a array of integers //can I write like     optional int[] array =3; //or should I use      optional repeated array; //where array is another message with int variable  } 

Is my approach correct?

Answer 1

Array is mapped via "repeated":

 repeated int32 data = 4; 

Note you might want sint32/uint32. Also note that in all three cases "packed arrays" can be used, which are more efficient;

repeated int32 data = 4 [packed=true];