Hi, I have a string variable, vq9_breakupdivorce, which has only 2 string values.

Code:
* Example generated by -dataex-. To install: ssc install dataex
clear
input str23 vq9_breakupdivorce
"NO TO: Break up/divorce"
"NO TO: Break up/divorce"
"Break up/divorce"       
"Break up/divorce"       
"NO TO: Break up/divorce"
end
I want to encode it to 0 and 1. And 0 denotes NO TO: and 1 denotes otherwise. How to use substr? Because I have multiple such variables, and all of them are in this form (NO TO: = 0).