/in/foo.c: In function 'main':
/in/foo.c:8:25: warning: left-hand operand of comma expression has no effect [-Wunused-value]
    8 |         for(int i=1;i<=n,i++)
      |                         ^
/in/foo.c:8:29: error: expected ';' before ')' token
    8 |         for(int i=1;i<=n,i++)
      |                             ^
      |                             ;