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#### 11.1.1 Constant folding

In Free Pascal, if the operand(s) of an operator are constants, they will be evaluated at compile time.

Example

x:=1+2+3+6+5;

will generate the same code as

x:=17;

Furthermore, if an array index is a constant, the offset will be evaluated at compile time. This means that accessing MyData[5] is as efficient as accessing a normal variable.

Finally, calling Chr, Hi, Lo, Ord, Pred, or Succ functions with constant parameters generates no run-time library calls, instead, the values are evaluated at compile time.

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