Enter the Filename (x.txt) with Data in List context: x.txt

 List= (10,12,14,16,18);

 Array From the List= ( 1 0 , 1 2 , 1 4 , 1 6 , 1 8 ) ;

 Number= 17
Use of uninitialized value $sum in division (/) at C:\Users\x\Desktop\mean.pl
 line 21, <FILE> line 1.

 Mean of the list= 0