Compile and Execute Pascal Online

Program Prime_No;
var num,count,remainder:real;
begin
    writeln('Input a number to check if it is a prime number.');
    readln(num);
    count:=2;
    remainder:=1;
    repeat until count<=num and remainder=1
        remainder:= num mod count;
        count:= count+1;
    if remainder=0
        writeln('the number ',num,' is not a prime number.');
    else
        writeln('the number ',num,' is a prime number.');
end.