Summing elements in a list

Question

Here is my code  I need to sum an undefined number of elements in the list  How to do this   l   raw input   l   l split      l pop 0    My input  3 5 4 9 After input I delete first element via l pop 0   After  split      my list is   5    4    9   and I need to sum all elements in this list   In this case the sum is 18  Please notice that number of elements is not defined

User · Answer

def sumoflist l           total   0         for i in l          total   i     return total

User · Answer

You can use map function and pythons inbuilt sum   function  It simplifies the solution  And reduces the complexity      a map int raw input   split        sum a  Done

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You can sum numbers in a list simply with the sum   built-in   sum your list    It will sum as many number items as you have  Example   my list   range 10  17  my list  10  11  12  13  14  15  16   sum my list  91   For your specific case   For your data convert the numbers into int first and then sum the numbers   data     5    4    9    sum int i  for i in data  18   This will work for undefined number of elements in your list  as long as they are  numbers    Thanks for  senderle s comment re conversion in case the data is in string format

User · Answer

You can use sum to sum the elements of a list  however if your list is coming from raw input  you probably want to convert the items to int or float first   l   raw input   split      sum map int  l

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You can also use reduce method    gt  gt  gt  myList    3  5  4  9   gt  gt  gt  myTotal   reduce lambda x y  x y  myList   gt  gt  gt  myTotal 21   Furthermore  you can modify the lambda function to do other operations on your list

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gt  gt  gt  l   raw input   1 2 3 4 5 6 7 8 9 10  gt  gt  gt  l   l split    gt  gt  gt  l pop 0   1   gt  gt  gt  sum map int  l    or simply sum int x  for x in l    you ve to convert the elements to integer first  before applying sum   54

User · Answer

Python iterable can be summed like so -  sum range 10  1       This sums all elements from the list except the first element    gt  gt  gt  atuple    1 2 3 4 5   gt  gt  gt  sum atuple  15  gt  gt  gt  alist    1 2 3 4 5   gt  gt  gt  sum alist  15

[python] Summing elements in a list

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