add for loop
Revert "add for loop"

This reverts commit e616e685e4da01ea00852e106bfcba1ecd1a7a33.
Revert "Revert "add for loop""

This reverts commit dee22301db2eaa172e8f85758c010ca808e7f42e.
Merge branch 'master' of https://github.com/laoar/helloworld