Which line number in the following program contains an error?

1. #include  2. 3. // function main begins program execution 4. int main( void ) 5. { 6. int x=2; y=3; z=x+y; 7. printf( "Welcome to C! " ); 8. }// end function main 

6 (error or no error)

7(error or no error)

1(error or no error)

4(error or no error)