This command subtracts an amount from the current value of a variable If you do not specify the amount, then the variable will be decremented by one This command works exactly the same for global and local variables
The reduction of the numerical contents of a counter A decrement of 1 is usually assumed, unless otherwise specified It is the complementary operation of INCREMENT
A name given by Haüy to the successive diminution of the layers of molecules, applied to the faces of the primitive form, by which he supposed the secondary forms to be produced