sum, prod, cumsum, cumprod
Function sum adds row elements, and the function prod multiplies row elements:
>> sum(1:1000)
ans =
500500
>> prod(1:5)
ans =
120
Function cumsum computes a row of the partial sums and cumprod computes a row of the partial products:
>> cumprod(1:7)
ans =
1 2 6 24 120 720 5040
>> cumsum(odds)
ans =
1 4 9 16 25 36 49 64
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