Central District (Botswana) which are responsible for local administration. The total number of workers constituted 186,943 with 95,717 males and 91,221 females, with a majority working in transport and communication sector. In the northeast, Central borders Zimbabwe's Matabeleland North and Matabeleland South Provinces, and in the southeast Central borders South Africa's Limpopo Province. It borders North-East in the northeast, Kgatleng in the south, Kweneng in southwest, Ghanzi in the North and North-West in the northwest direction. The major tourists attractions and game areas in the district along with the Eastern region are Francistown, Selebi-Phikwe, Solomon's Wall, Lepokole Hills, Tswapong Hills, Moremi Gorge, Motlhabaneng
Use-define chain variable and all the uses, U, reachable from that definition without any other intervening definitions. Both UD and DU chains are created by using a form of static code analysis known as data flow analysis. Knowing the use-def and def-use chains for a program or subprogram is a prerequisite for many compiler optimizations, including constant propagation and common subexpression elimination. Making the use-define or define-use chains is a step in liveness analysis, so that logical representations of all the variables can be identified and tracked through the code. Consider the following snippet of code: Notice that codice_1 is assigned a