Variable-has an initial value and a current value. When executing an open program, move the pointer to main and move the pointer to routine, the current value of the variable will be initialized, that is, the value will become the initial value variable, only the current value. In other words, whenever it is modified, its value will be modified.

Open the program and move the pointer to main. When moving the pointer to routine, the value is the current value and will not change. By default, the storage type of the inserted robtarget is const, that is, constant, so it cannot be assigned at this time.