Index of arrays and strings in c++

I want to know from where the index of a string and an array starts from. I am getting a lot of confusion while making programs.

While calculating string length of a string is the null character also count开发者_JS百科ed?

In C, C++, Java, and Python, array indices are 0-based, so they range from 0 to length-1. Some mathematically-oriented programming languages such as Matlab are 1-based. As a general rule of thumb, "real programming languages" tend to use 0-based indexing; mathematical/protoyping/modeling languages or other domain-specific languages may use 0-based or 1-based indexing, with 1-based common for math.

In terms of strings, the length of a string usually refers to the number of characters in the string excluding the terminating NUL-character, while the length of the buffer refers to the entire buffer's length, including the terminating NUL. You will find that std::string::size() and strlen() return the number of characters in the string, excluding the terminating NUL (i.e. the string length). The length of the buffer is actually one more than that.

The index starts from ZERO.

Not entirely clear what you're asking.

If you're asking whether strings and arrays start at index 0, then Yes.

http://en.wikipedia.org/wiki/Zeroth