unsigned char

[deveshkumar]

what is the meaning of signed & unsigned with char data type?

[Banfa]

A signed char holds a value between -128 and 127 (on a system with 8 bit characters), an unsigned char holds a value between 0 and 256.

[pradeep kaltari]

Considering a system with 8 bit characters::

In signed char the first bit (Most significant bit) holds the signs and the remaining 7 bits hold the actual value; hence the range: -128 to +127 (max value being 2^7). In unsigned char all the 8 bits hold the value; range:0 to 255 (max value being 2^8).

[pradeep kaltari]

Considering a system with 8 bit characters::

In signed char the first bit (Most significant bit) holds the signs and the remaining 7 bits hold the actual value; hence the range: -128 to +127 (max value being 2^7). In unsigned char all the 8 bits hold the value; range:0 to 255 (max value being 2^8).

the max value of unsigned char is 2^8-1 i.e 255 (has been put as 2^8 in my last post by mistake)