I have never used octal numbers in my code nor come across any code that used it. I bet you have. According to the standard, numeric literals which start with zero are octal. This includes, trivially, 0. Every time you have used or seen a literal zero, this has been octal. Strange but true.
If you are making child support payments in Texas, the law generally requires you to do so until your child turns 18, which is the age that marks adulthood in the state, or when he graduates from high school -- whichever comes later.
How long does child support last after the child is 18 not going to school and has her own child?   Answer   Usually child support stops when the child reaches 18 or leaves full time education, whichever is the later. Nine years of answering historical, educational and home improvement questions on answers.com.