Why array print different-2 value using ,(comma) and .(period sign)?

 my @arr = qw(12 5 78 56 1 785);
 my @new_arr = sort { $a <=> $b } @arr;
 print  @new_arr . "\n\n" ; #### print 6
 print  @new_arr , "\n\n" ; #### print value 开发者_如何学Cin short order

Hi, Could anyone tell me why it is printing different-2 value.

Thx, Vijay

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The first one prints the concatenation of @new_arr with the string "\n\n". That contatenation forces scalar context on @new_arr, hence it evaluates as its number of elements, in your case 6.

The second one evaluates all arguments to print in list context, hence @new_arr evaluates to the list of all its elements.