Question

How to set a default value to function parameters in Pascal

Answer 1

// Pascal does not support default parameter values in functions or procedures.

// Some Pascal compilers support function overloading. 
// This allows you to define two versions of the same function with different parameter lists.

program DefaultParameterProgram;

function AddNumbers(a: Integer; b: Integer): Integer; // First version
begin
  AddNumbers := a + b;
end;

function AddNumbers(a: Integer): Integer; // Second version (overloaded)
begin
  AddNumbers := AddNumbers(a, 10); // Call the first version with default b = 10
end;

begin
  writeln(AddNumbers(8));    
  writeln(AddNumbers(9, 16)); 
end.



(*
run:

18
25

*)

 

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