5.43.34 Cumulated sum of the elements of a list: cumSum
cumSum takes as argument a list l (resp. sequence)
of numbers or of strings.
cumSum returns the list (resp. sequence) with same length as l and
with k-th element the sum (or concatenation) of the
elements l[0],..,l[k].
Input:
cumSum(sqrt(2),3,4,5,6)
Output:
sqrt(2),3+sqrt(2),3+sqrt(2)+4,3+sqrt(2)+4+5,
3+sqrt(2)+4+5+6
Input:
normal(cumSum(sqrt(2),3,4,5,6))
Output:
sqrt(2),sqrt(2)+3,sqrt(2)+7,sqrt(2)+12,sqrt(2)+18
Input:
cumSum(1.2,3,4.5,6)
Output:
1.2,4.2,8.7,14.7
Input:
cumSum([0,1,2,3,4])
Output:
[0,1,3,6,10]
Input:
cumSum("a","b","c","d")
Output:
"a","ab","abc","abcd"
Input:
cumSum("a","ab","abc","abcd")
Output:
"a","aab","aababc","aababcabcd"