View Compilation Error

0_0_27275239_9534.cpp: In function 'int main()':
0_0_27275239_9534.cpp:11:17: error: expected ';' before ')' token
 for(i=1;i<=n,i++)
                 ^
0_0_27275239_9534.cpp:14:1: error: expected ';' before 'sum'
 sum+=a;
 ^