What are variables and keywords in c++

Apr 10, 2019Download as pptx, pdf1 like845 views

Hi I am Abdul Hafeez ,I made this videos for Beginner and intermediate students, they can easily understand basic structure of c++ programming. In this lecture students can understand easily: * what is variables in c++ Programming? * variables and data types in c++ Programming * how to declare variables in c++ Programming * how to initialize variables in c++ Programming * keywords in c programming * keywords in c++ programming * variables and data types in c++ Programming * size of data types in c++ Programming * range of data types in c++ programming * how are variables stored in memory? C++ tutorials in URDU - HINDI Basic concepts and advance concepts

Keywords:
 Keyword has a predefined meaning and purpose. It is
defined by the developer.
Keywords are also known as reserved words.
 Keywords/Reserved words can not be declared as
variable name.

Keywords:
auto const double float int short struct unsigned
break continue else for long void signed switch
case default enum goto register sizeof volatile typedef
if char do extern while static union return
Keywords in the C programming language:
Total Number of keywords in C Programming:
32

Keywords:
asm bool catch class const_c
ast
delete try typeid
typenam
e
using virtual wchar_t dynamic
_cast
namespa
ce
reinterpr
et_cast
explicit
new static_ca
st
mutable catch false operator template protected
const_ca
st
inline public throw true public
Keywords in the C++ programming language:
Total Number of keywords in C++ Programming:
30

What is Variable?
 A variable can be defined as “It is a memory location
or Memory Cell.”
Variables are created in the RAM.
 Keywords/Reserved words can not be declared as
variable name.

int  Store numeric values
Float  Store Real values
Double  Store Large Real values
Char  Store Character
values
C++ Provides following data types:

integer data type divided into Four Categories:
Data Type Size in bytes
 int
 Short
 unsigned int
 long
 unsigned long
2
2
2
4
4

Range of integer data type:
Data Type Range of values
 int
 short
 unsigned int
 long
 unsigned long
32768 to 32767
32768 to 32767
0 to 65535
2147483648 to
2147483647
0 to 4294967295

Float/Real data type divided into Three
Categories:
Data Type Size in bytes
 float
 double
 long double
4
8
10

Range of Float/Real data type :
Data Type Range of Values
 float
 double
 long double



  )32(10*4.3__)32(10*4.3 TO
)308(
10*7.1
)308(
10*7.1



TO
)4932()4932(
10*7.110*7.1 
TO

How to Declare Variable:
 Syntax:
 Data type variable name;
 Explanation:
 Data type: It refers to type of data that store in
variable.
 Variable name: It is the memory location of the
variable.

Character Data Type
Data Type Size in bytes
 char
 char data types is
used to store
character vale
1
Examples
Aa-Zz,1-9,#,-,@,* etc.
Definition and its example

How to Initialize Variable:
 Syntax:
 Data type variable name value;
 Explanation:
 Data type: It refers to type of data that store in
variable.
 Variable name: It is the memory location of the
variable.
= Assignment Operator.
 Value: Value to initialize a variable.

How to Initialize variable:
Data
type
Variabl
e
Name
Value
of
Variabl
e
Semicolons
indicates
statement
terminator

RAM
2Value of Variable
Name of Variable Age
Address of Variable

Thanks for Your Attention
Presentation
Designer
Abdul Hafeez

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What are variables and keywords in c++

3. Keywords:  Keyword has a predefined meaning and purpose. It is defined by the developer. Keywords are also known as reserved words.  Keywords/Reserved words can not be declared as variable name.

4. Keywords: auto const double float int short struct unsigned break continue else for long void signed switch case default enum goto register sizeof volatile typedef if char do extern while static union return Keywords in the C programming language: Total Number of keywords in C Programming: 32

5. Keywords: asm bool catch class const_c ast delete try typeid typenam e using virtual wchar_t dynamic _cast namespa ce reinterpr et_cast explicit new static_ca st mutable catch false operator template protected const_ca st inline public throw true public Keywords in the C++ programming language: Total Number of keywords in C++ Programming: 30

6. What is Variable?  A variable can be defined as “It is a memory location or Memory Cell.” Variables are created in the RAM.  Keywords/Reserved words can not be declared as variable name.

7. int  Store numeric values Float  Store Real values Double  Store Large Real values Char  Store Character values C++ Provides following data types:

8. integer data type divided into Four Categories: Data Type Size in bytes  int  Short  unsigned int  long  unsigned long 2 2 2 4 4

9. Range of integer data type: Data Type Range of values  int  short  unsigned int  long  unsigned long 32768 to 32767 32768 to 32767 0 to 65535 2147483648 to 2147483647 0 to 4294967295

10. Float/Real data type divided into Three Categories: Data Type Size in bytes  float  double  long double 4 8 10

11. Range of Float/Real data type : Data Type Range of Values  float  double  long double      )32(10*4.3__)32(10*4.3 TO )308( 10*7.1 )308( 10*7.1    TO )4932()4932( 10*7.110*7.1  TO

12. How to Declare Variable:  Syntax:  Data type variable name;  Explanation:  Data type: It refers to type of data that store in variable.  Variable name: It is the memory location of the variable.

13. Character Data Type Data Type Size in bytes  char  char data types is used to store character vale 1 Examples Aa-Zz,1-9,#,-,@,* etc. Definition and its example

14. How to Initialize Variable:  Syntax:  Data type variable name value;  Explanation:  Data type: It refers to type of data that store in variable.  Variable name: It is the memory location of the variable. = Assignment Operator.  Value: Value to initialize a variable.

15. How to Initialize variable: Data type Variabl e Name Value of Variabl e Semicolons indicates statement terminator

16. RAM 2Value of Variable Name of Variable Age Address of Variable

17. Thanks for Your Attention Presentation Designer Abdul Hafeez

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