Turbo Pascal Homework Problem: Why did Error 57 pop up in a row it shouldn't have?

Question

I attend 1st grade of Highschool. Recently I had an assignment to do in Turbo Pascal and this happened:

var
   a,b,x,y,n:integer;
begin
   readln(a,b,x,y);
   if a<b and x<y then n:=a+y;
   if a<b and x>y then n:=a+y;
   if a>b and x<y then n:=b+x;
   if a>b and x>y then n:=b+x;
   writeln(n);
end.

An Error 57 appeared in the second if row between "y" and "<".

Can someone explain why this happened?

question from:https://stackoverflow.com/questions/65884680/turbo-pascal-homework-problem-why-did-error-57-pop-up-in-a-row-it-shouldnt-hav

Answer 1

Waitting for answers