Does every BCA program have maths as a subject?

BCA is a 3 year degree program. These 3 years are divided into 6 semesters, out of which 4 semesters contain Maths as a compulsory subject. Some colleges do offer BCA without Mathematics, but then there’s no use of doing this degree. 

Maths is a foundational subject for BCA, and without understanding the basic logic you can’t be a good programmer. For that you need Maths. 

You can pursue BCA without having Maths as a subject in your 10+2, but then you’ll have to work hard on this subject in the course of your degree program.