How to count a character string position?

I have a character string with 00101100

There is data where there is 1 and nothing in 0.

I wanted to it to display the places with the datas.

For example "The places with data are 3, 5, 6"

Answer 1

[Stephen23]

S = '00101100';
X = strfind(S,'1');
fprintf('The places with data are %s\n',join(string(X),", "))

The places with data are 3, 5, 6

Answer 2

[Walter Roberson]

 S = '00101100'

S = '00101100'

 find(S == '1')

ans = 1×3

3 5 6