Hello,
I would like to know how to add up values in a for loop. I am using DHS data, and using the code below, I would like to add up the total number of siblings that have died in the dataset. The variable mm2_1 is the firstborn (oldest) sibling a respondent has, and a value of '0' means they have died'

forvalues i = 1/20 {
count if mm2_`i'== 0
}

This code returns the following. The first line therefore represents the total number of 'oldest' siblings that have died:
19,958
16,830
14,516
12,341
10,606
8,672
6,719
5,182
3,461
2,110
1,308
616
262
143
59
22
20
6
2
0

All I want is a way to add these numbers up quickly, but I haven't been able to figure out the code.

Thank you!

Kathleen