Programmimng by AJAY WADEKAR

  BUILT IN OF PRIMARY DATA TYPE     int (Integer) float(Floating-point) double (Double Floating-point) char (Character) wchar_t (Wide Character) bool (Boolean) void (Empty) Modified Data Types List    signed int - (used for integers) unsigned - int (can only store positive integers) short (used - for small integers (range -32768 to 32767)) unsigned short - (used for small positive integers (range 0 to 65,535)) Long - (used for large integers) unsigned long - (used for large positive integers ) long long - (used for very large integers) unsigned long long - (used for very large positive integers) long double - (used for large floating-point numbers) signed char - (used for characters (guaranteed range -127 to 127)) unsigned char - (used for characters (range 0 to 255)) Derived Type Data Type    Function Array Pointers References User-Defined Data Type   Class Structure Union Enumeration Typedef defined DataType

  What Are Tokens?   In simple terms, tokens represent the smallest meaningful components of any program that the compiler easily comprehends. They can be classified into six sub-categories: 1. Keywords 2. Constants 3. Strings 4. Identifiers 5. Operators 6. Special Symbols Now, let's explore each category: Keywords : Keywords are reserved terms in programming languages that provide specific functionalities to the program. They cannot be used as variable names. C/C++ pre-processor directives, such as header files, can modify keywords before compilation.   Constants : Constants, like variables, are unchanging values. The key distinction is that the program cannot modify the value of a constant after it has been defined. Constants can belong to various data types, including integer, floating-point, octal, hexadecimal, character, and string constants.   Strings : Strings are arrays of characters ending with a null character "\0". They are enclo