Hi, I need to use floor function to write a program in Pascal, does pascal have it as a procedure/function in its library? My compiler is Turbo Pascal for windows version 1.5, so it might be outdated. Somewhere on the internet I read that if I write 'uses math;' then I could use math functions that are in pascal's library, I did that but when I write floor or ceil the answer I get is 'Uknown identifier'. Can I write the floor function in Pascal on my own or that would be too hard? What should I do? P.S: I'm a math major and I don't know much about programming like a CS student, I just need to write a bunch of programs in Pascal for my numerical analysis class.