Tokens
Keyword
This word is having some
Special Meaning. (i.e.) for this word already some program build by the author.
Ex for, while, if, int…
Data-type
Which type of data we are
giving that is data type. There are two types.
1.
Numeric
Data type.
i.
integer
ii.
floating
point
2.
Character
Data Type.
i.
Character
ii.
String
Table
for Data type details
|
Target
|
Data-Type
|
C/S
|
Bytes
|
Range
|
|
Whole number
|
Int
|
%d
|
2 Bytes
|
-32768to 32767
|
|
Floating Point
|
Float
|
%f
|
4 Bytes
|
3.4E-38to3.4E+38
|
|
Character
|
Char
|
%c
|
1 Byte
|
-128 to 127 and 0 to 255
|
|
String
|
Char-Array
|
%s
|
User-Define
|
User-Defined
|
Variables
or Identifiers:
Variables means Named Memory Location.
Rules for Naming Variables:
i.
Variable
name should be started with Alphabet or Underscore
ii.
Variable
name should contain with in 32 characters.
iii.
Variable
name should not be in keyword.
iv.
Variable
name should have the following range...
A - Z, a - z, 0 -9, _
Declaring Variables:
[
Storage-Class] <Data-type> Variable1,Variable2,...;
Ex:
int a, b, c; a=12 à Integer
Variable
Char ch, dh; ch='i' à Character
Variable
float jk, kl; jk=12.34 à Floating
Point Variable
Constants
The Contants means nothing
but, During Program Execution the Variables Value won't change.By using
<const> Key word we can able to mention the variables as a constant
variables. If you need to modify the value of the constant variable during
program execution time by using pointer we can able to perform that operation.
Syntax
<const>
variable = <Value>;
or
<const>
<Data-Type> Variable-Name = <Value>;
Ex
const a =
12;
const
float b = 12.45;
The Constants is classified into Two types.
i.
Numeric
Constants.
ii.
Character
Constants.
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