Data Type | Format Specifier | Size( In BYTES) | Range | |
|
| ||||
Unsigned Char
|
%c
|
1 (8 bits)
|
0 to 255
| |
Signed Char (or) Char
|
%c
|
1 (8 bits)
|
-128 to 127
| |
Unsigned Short Int
|
%hu
|
2 (16 bits)
|
0 to 65535
| |
Signed Short Int (or)
Short Int
|
%hd
|
2 (16 bits)
|
-32768 to 32767
| |
Unsigned Long Int
|
%lu
|
4 (32 bits)
|
0 to 4294967295
| |
Signed Long Int (or)
Long Int
|
%ld
|
4 (32 bits)
|
-2147483648 to 2147483647
| |
Unsigned Long Long Int
|
%llu
|
8 (64 bits)
|
0 to 18446744073709551615
| |
Signed Long Long Int (or)
Long Long Int
|
%lld
|
8 (64 bits)
|
-9223372036854775808 to
9223372036854775807 | |
Real Data
| ||||
Float
|
%f , %e
|
4 (32 bits)
|
2^-149 to 2^127
| |
Double
|
%lf , %e
|
8 (64 bits)
|
2^-1074 to 2^1023
| |
Long Double
|
%Lf , %e
| |||
IEEE 754 Standard Representation Of Floating Point Data :
Float( 32 bits)
|
Double(64 bits)
| |
Sign
|
1 bit
|
1 bit
|
Exponent
|
8 bits
|
11 bits
|
Mantissa/Significand
|
23 bits
|
52 bits
|
Bias Value
|
127 (0x3f)
|
1023 (0x3ff)
|
Eg :
1. Let Us Try To Represent 20.4 in Floating Point Representation:
According To IEEE 754 Standard Representation 20.4 = 1 . 01000110011001100110011 * E ^ (4)
Note : - Only One 1 before the decimal point .
If 20.4 Is Declared As Float.
So , Here Exponent = Bias Value For Float + 4 = 127+4 = 131 = 10000011.
Significand = 0110011001100110011
So , 20.4 = 0 10000011 01000110011001100110011 , As Represented Below
Note :1
Fixed Point Representation Of Real Data : 123.456.
Floating Point Representation Of Real Data : 1.23456 * 10^(2)
Fixed Point Representation Limits The Range Of Real Data To ( 2^ -31 To 2^32 ) Where As Floating Point Representation Facilitates It To Store A Range Of ( 2^ -149 To 2^ 127 ).
Note :2
Its Always Recommended To Use Appropriate Format Specifiers While Handling Data , Such that We Can Avoid Undefined/Unexpected Data .
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