View Compilation Error

0_0_37813527_29943.cpp: In function 'int main()':
0_0_37813527_29943.cpp:29:24: error: expected primary-expression before ';' token
         for(int i=1;i<=;6i++)
                        ^
0_0_37813527_29943.cpp:29:25: error: unable to find numeric literal operator 'operator""i'
         for(int i=1;i<=;6i++)
                         ^
0_0_37813527_29943.cpp:29:25: note: use -std=gnu++11 or -fext-numeric-literals to enable more built-in suffixes