Variables. A variable is a symbolic name for (or reference to) information. The variable's name represents what information the variable contains. They are called variables because the represented information can change but the operations on the variable remain the same. In general, a program should be written with Symbolic notation, such that a statement is always true symbolically.
Definition of overwatch. 1  1 archaic : to weary or exhaust by keeping awake. 2  2a obsolete : to watch through or throughout (as the night) b : to watch over. 3  3 : to support by fire another element which is moving tanks overwatching an assault battalion.
verb (used without object) 1. to be alertly on the lookout, look attentively, or observe, as to see what comes, is done, or happens: to watch while an experiment is performed. 2. to look or wait attentively and expectantly (usually followed by for): to watch for a signal; to watch for an opportunity.