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For ordinal index variables:
for ordinal_variable := initial_value to final_value do statementor
for ordinal_variable := initial_value downto final_value do statement
For sets:
for set_element_type_variable in some_set do statement
For pointer index variables:
for pointer_variable := initial_address to final_address do statementor
for pointer_variable := initial_address downto final_address do statement
@@ Set member iteration
The for statement is a count loop. For further information
see for Statement.
for is defined in ISO 7185 Pascal and supported by all
Pascal variants. Iteration of Pointers is a Borland Pascal extension.
Set member iteration is an ISO 10206 Extended Pascal extension.
program ForDemo;
var
CharSet: set of Char;
c: Char;
n: Integer;
Fac: array [0 .. 10] of Integer;
PInt: ^Integer;
begin
CharSet := ['g', 'p', 'c'];
for c in CharSet do
WriteLn (c); { prints `c', `g', `p' in three lines }
Fac[0] := 1;
for n := 1 to 10 do { computes the factorial of n for n = 0 .. 10 }
Fac[n] := Fac[n - 1] * n;
{$X+}
{ prints n! for n = 0 .. 10 }
for PInt := @Fac[0] to @Fac[10] do
WriteLn (PInt - @Fac[0], '! = ', PInt^)
end.