What is invalid syntax and syntax error

Question

Error

Answer 1

It means you derived variables wrong way, it's not valid by syntax standards of programming language.
If you show the code snippet which giving error, then community may help you with giving corrected code..
Hoppy coding..

Answer 2

Just like if u write '2.3.5' in a calculator it would throw a syntax error coz 2.35 is correct.
In programming languages, there are some rules like in C++ you must end ur statements with a semi-colon.

Answer 3

Thanks