@Decrement

Decrements FN FN1 by 1 and writes the result directly to FN1.

NOTE:
This @function is highly optimized and extremely fast. The @function does never return a value.
The return value of the @function is undefined !!!
The Expression:
Y:=1;
X:=@Increment(Y);

does not return 2 in X, but POTENTIAL VAR; Y, however, contains the value 2 after the script is executed.

Example: @Decrement(FN1)

FN:=10;
@Decrement(FN1);

After execution, FN1 the value 9.

Note : This text was machine-translated and may contain inaccuracies.