Lab5-Find Sum of value in array

def findSum():
   ListNum=[1,2,3,4,5,6,7,8]
   i=0
   sum=0
   #lengthListNum=len(ListNum)-1
   while(i<len(ListNum)):
      sum=sum+ListNum[i]    
      print("+",ListNum[i])  
      i=i+1
   print("Sum=",sum)
findSum()


Result

+ 1
+ 2
+ 3
+ 4
+ 5
+ 6
+ 7
+ 8
Sum= 36