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#### Assignments

Assignments give a value to a variable, replacing any previous value the variable might have had:

_________________________________________________________________________________________________________ Assignments
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In addition to the standard Pascal assignment operator ( := ), which simply replaces the value of the varable with the value resulting from the expression on the right of the := operator, Free Pascal supports some c-style constructions. All available constructs are listed in table (7.1).

Table 7.1: | Allowed C constructs in Free Pascal
Assignment | Result
a += b | Adds b to a, and stores the result in a.
a -= b | Substracts b from a, and stores the result in a.
a *= b | Multiplies a with b, and stores the result in a.
a /= b | Divides a through b, and stores the result in a.

For these constructs to work, the -Sc command-line switch must be specified. Remark: These constructions are just for typing convenience, they don’t generate different code. Here are some examples of valid assignment statements:

     X := X+Y;
     X+=Y;      { Same as X := X+Y, needs -Sc command line switch}
     X/=2;      { Same as X := X/2, needs -Sc command line switch}
     Done := False;
     Weather := Good;
     MyPi := 4* Tan(1);

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