Most programming languages support global variables, but they tend to do it in different ways. For example, PHP uses the global keyword to access a variable declared outside any function: ...

For example, a variable can be used in the program that controls an automatic car park barrier. It can keep track of the number of cars going in and out and decide whether to let more cars in.

The row with BINARY type indicates that this problem is a mixed integer program and all the integer variables are binary. The integer values of the row set an ordering for PROC LP to pick the ...