Summing the elements of an array while maintaining its size

There is an array of data, I need to sum it while maintaining the length of the array

a=[0 2 2 6]
Ineed=[0 2 4 10]

there are some functions for this or it will be necessary to write a cycle, I will be glad for any help

Answer 1

[KSSV]

a=[0 2 2 6];
Ineed=cumsum(a)

Ineed = 1×4

0 2 4 10