Basic concepts of C++
Character Set of C++
These are the characters which we can use in C++ . Character set includes following characters
- Alphabets ( a-z, A-Z )
- Digits (0-9)
- Special Characters ( #,+,-,*, \ , / etc.)
- White Spaces (Blank Space, Backspace, tab etc.)
Token in C++
Smallest identifiable parts of a Program is known as token.
There are six types of tokens
Keyword in C++
Keywords are reserved and predefined words of C++. They have predefined meanings and functioning. 48 standard keywords are provided by C++. They are as follows:
auto asm break case catch char
const continue class default delete do
double else enum extern float for
friend goto if inline int long
new operator private protected public register
return short signed sizeof static struct
switch template this throw try typedef
union unsigned virtual void volatile while
Keywords can’t be used as identifiers, variables or named constants. With advancements in C++, various new keywords are being added.
Identifier in C++
Different quantities such variable, constant, functions can be called identifiers.
Rules for naming an identifier are as follows
- Alphabets as well as digits can be used.
- First character can be alphabet or underscore.
- Digits can appear only after first character.
- No special characters except underscore can be used.
- Keyword can’t become identifiers.
- Space can’t appear.