2. Data types Data types Basic types
Byte, short, int, long, Char, Float, double, void
Derived types
array, pointers, references
User defined datatype
structure, union, class, type def.

3. Data Types: Display 1.2 Simple Types (1 of 2)

4. Data Types: Display 1.2 Simple Types (2 of 2)

5. C++ Tokens C++ Tokens are the smallest individual units of a program.
Following are the C++ tokens : (most of c++ tokens are basically similar to the C tokens)
Keywords
Identifiers
Constants
Variables
Operators

6. Keywords (in C) Auto double int struct break else long switch case
enum
register
typedef
char
Extern
return
union
const
float
short
unsigned
continue
for
signed
void
default
goto
sizeof
volatile do if
static
while

7. Keywords (additionally in C++)
asm
bool
catch
class
const_cast
delete
dynamic_cast
export
false
friend
inline
mutable
namespace
new
operator
private
protected
public
reinterpret_cast
static_cast
template
this
throw
true
try
typeid
typename
using
virtual
wchar_t

8. Identifiers
Identifiers are used as the general terminology for naming of variables, functions and arrays. These are user defined names
Rules:
They must begin with a letter or underscore(_).
They must consist of only letters, digits, or underscore. No other special character is allowed.
It should not be a keyword.
It must not contain white space.
It should be up to 31 characters long as only first 31 characters are significant.

9. Identifiers NAME REMARK int _A9 Valid
double Temp.var Invalid as it contains special
character other than the
underscore
void Invalid as it is a keyword
char a_a Valid
Int asm

10. Constants (literals) Syntax: const data_type variable_name; (or)”

11. Types of Constants: Integer constants –
Example: 0, 1, 1218, const int x=1218;
Real or Floating point constants –
  Example: 0.0, , const float x= ;
Character constants –
Example: ‘a’, ‘A’, ‘z’ char a=‘d’ , char q=‘Z’
String constants –
Example: char s[]=“GeeksforGeeks”

12. Strings
char string[20] = {‘g’, ’e’, ‘e’, ‘k’, ‘s’, ‘f’, ‘o’, ‘r’, ‘g’,
’e’, ‘e’, ‘k’, ‘s’, ‘\0’};
char string[20] = “geeksforgeeks”;
char string [] = “geeksforgeeks ABCD”;

13. Special Symbols: Brackets[]: Parentheses(): Braces{}: comma (, ):
semi colon : 
asterick (*): It is used to create pointer variable.
assignment operator: It is used to assign values.
pre processor(#): The preprocessor is a macro processor that is used automatically by the compiler to transform your program before actual compilation.

14. Operators: Unary Operators (a++, --b) Binary Operators (a+b,
Ternary Operators (Substitute for if-else)
(a>b ? A: B)

15. Types of operators Arithmetic Operators Relational Operators
Logical Operators
Bitwise Operators
Assignment Operators

16. Arithmetic

17. == != > < >= <= Relational
Operator
Description
Example ==
Checks if the values of two operands are equal or not, if yes then condition becomes true.
(A == B) is not true. !=
Checks if the values of two operands are equal or not, if values are not equal then condition becomes true.
(A != B) is true.
>
Checks if the value of left operand is greater than the value of right operand, if yes then condition becomes true.
(A > B) is not true.
<
Checks if the value of left operand is less than the value of right operand, if yes then condition becomes true.
(A < B) is true.
>=
Checks if the value of left operand is greater than or equal to the value of right operand, if yes then condition becomes true.
(A >= B) is not true.
<=
Checks if the value of left operand is less than or equal to the value of right operand, if yes then condition becomes true.
(A <= B) is true.

18. Logical
Operator
Description
Example
&&
Called Logical AND operator. If both the operands are non-zero, then condition becomes true.
(A && B) is false. ||
Called Logical OR Operator. If any of the two operands is non-zero, then condition becomes true.
(A || B) is true. !
Called Logical NOT Operator. Use to reverses the logical state of its operand. If a condition is true, then Logical NOT operator will make false.
!(A && B) is true.

19. Bitwise & | ^ ~ << >>
Binary AND Operator copies a bit to the result if it exists in both operands.
(A & B) will give 12 which is |
Binary OR Operator copies a bit if it exists in either operand.
(A | B) will give 61 which is ^
Binary XOR Operator copies the bit if it is set in one operand but not both.
(A ^ B) will give 49 which is ~
Binary Ones Complement Operator is unary and has the effect of 'flipping' bits.
(~A ) will give -61 which is in 2's complement form due to a signed binary number.
<<
Binary Left Shift Operator. The left operands value is moved left by the number of bits specified by the right operand.
A << 2 will give 240 which is
>>
Binary Right Shift Operator. The left operands value is moved right by the number of bits specified by the right operand.
A >> 2 will give 15 which is