I am surprised you did not get that from mathematics, so I wonder what level/type of mathematics did you do?
I can get that you usually don't get it from regular high school mathematics, but even there one should learn to deal with proofs and deducing stuff in a precise, non-ambiguous way, and you have to pay attention to detail.
Coding allowed me to build things with my analytical mind liking precision and patterns, so it's the way for my "mathematical" brain to express creativity.
I did not mention that mathematics did not teach me that, but programming pushed that to a limit that maths didn't - probably because I do not spend 8h a day, every working day doing maths :)
I can get that you usually don't get it from regular high school mathematics, but even there one should learn to deal with proofs and deducing stuff in a precise, non-ambiguous way, and you have to pay attention to detail.
Coding allowed me to build things with my analytical mind liking precision and patterns, so it's the way for my "mathematical" brain to express creativity.