Create an algorithm and a program for calculating the circumference of a circle, if its radius is given. (L = 6.28 * R)

program zz1;
var r, L: real; // set variables of non-integer type
begin
write (‘enter the initial value for the radius of the circle’); // enter the initial value of the circle radius from the keyboard
read (r);
L: = 6.28 * r; // calculate the circumference using the given formula
write (‘the resulting value of the circumference =’, L: 5: 2); // display the answer in the format of five digits for the whole number and two decimal places
end.