Answer 1

What is logical error?
Logical errors – also called semantic errors, logical errors cause the program to behave incorrectly, but they do not usually crash the program. Unlike a program with syntax errors, a program with logic errors can be run, but it does not operate as intended.
Learn more about errors:
http://geek-university.com/JUMP_LINK__&&__python__&&__JUMP_LINK/syntax-and-logical-errors/