When you have a mental block or in the midst of a rut, you can choose to implement several strategies that would help you escape this condition. Based on the options available for the question given, you can choose to:
[3] Rephrase your problem question. Looking at the problem from a different perspective can Inspire new ideas
[4] Take a break and come back later with a fresh mind. A clear mind will give you a new perspective
<span>New sources of power assist in the development of inventions since t</span>he new inventions would have been worthless without a reliable source of power energy.
The most straight forward way to do it: in general string are zero index based array of characters, so you need to get the length of the string, subtract one and that will be the last character, some expressions in concrete languages would be:
