To represent a negative number as a literal, prepend a minus sign (-) to the literal, as in -45. If you need to use a literal integer with octal numbering, prepend a 0 to the number. For example, the octal number 777 would be the literal 0777. Hexadecimal integers are used as literals by prepending the number with 0x, as in 0x12 or 0xFF. NOTE. Octal and hexadecimal numbering systems are convenient for many advanced programming uses, but unlikely to be needed by beginners.
To skip a period: 1  When taking monophasic birth control pills:  28-day oral contraceptive (OC) pack users: When you reach the end of the active hormonal pills in a pack (the first 21 or 24 pills), begin the next set of active pills, skipping the inactive (placebo pills) from the previous package.
However, thanks to the help of period delay medications, you now have the option to push back the start of your period for a couple of weeks until it's convenient. This can happen with certain types of birth control pills as well as medication Norethisterone that is specifically designed to delay your period. These treatments delay your period by controlling when the womb lining is shed, which provides control over when your period starts for whatever reason you decide to delay.