Python

>>> list = [1,2,3,4]
>>> tot = 0
>>> for i in list:
...     tot = tot + i
... 
>>> tot
10

>>> list = [1,2,3,4]
>>> sum(list)
10

>>> l = ['a',1,'f',3.2,4]
>>> sum([i for i in l if isinstance(i, int) or isinstance(i, float)])
8.2


>>> from operator import add
>>> list( map(add, list1, list2) )
[5, 7, 9]

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