Update array elements with the element before

Hey, How can i update array elements by adding to each element the whole elements before, e.g if i have an array with (1 2 3 4 5 6) i want to have the answer of (1 1+2 1+2+3 1+2+3+4 --------)?

Best regards!

Answer 1

[Stephen23]

V = 1:6

V = 1×6

1 2 3 4 5 6

Z = cumsum(V)

Z = 1×6

1 3 6 10 15 21

[Rayad Hallak]

Thank you this was really helpfull!