Sunday, March 5, 2023

Area of the Circle Using a Function in Pascal

 A program that will ask the user to give radius and then the program compute the area of the circle using a function in pascal programming language.

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Program Listing

program AreaOfCircle;



function CalculateArea(radius: Double): Double;

const

  PI = 3.14159; // defining the value of pi

begin

  CalculateArea := PI * radius * radius; // calculating the area of the circle

end;


var

  radius, area: Double;


begin

  writeln;

  write('Area of a Circle Using Functions in Pascal');

  writeln;

  Write('Enter the radius of the circle: ');

  ReadLn(radius);


  // calling the function to calculate the area of the circle

  area := CalculateArea(radius);


  WriteLn('The area of the circle with radius ', radius:0:2, ' is ', area:0:2, '.');

  writeln;

  write('End of Program');

  writeln;

end.


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