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Unsigned char in C with Examples
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Unsigned char in C with Examples

·278 words·2 mins·
Blog Programming C
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Deadnaut
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Table of Contents

Introduction
#

char is the most basic data type in C. It stores a single character and requires a single byte of memory in almost all compilers.

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Now character datatype can be divided into 2 types:

  1. signed char

  2. unsigned char

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unsigned char
#

  • unsigned char is a character datatype where the variable consumes all the 8 bits of the memory and there is no sign bit (which is there in signed char). So it means that the range of unsigned char data type ranges from 0 to 255.

Syntax:

unsigned char [variable_name] = [value]

Example:

unsigned char ch = 'a';

Initializing an unsigned char
#

  • Initializing an unsigned char: Here we try to insert a char in the unsigned char variable with the help of ASCII value. So the ASCII value 97 will be converted to a character value, i.e. ‘a’ and it will be inserted in unsigned char.
// C program to show unsigned char 

#include <stdio.h> 

int main() 
{ 

 int chr = 97; 
 unsigned char i = chr; 
 printf("unsigned char: %c\n", i); 

 return 0; 
}

Output:

unsigned char: a
  • Initializing an unsigned char with signed value: Here we try to insert a char in the unsigned char variable with the help of ASCII value. So the ASCII value -1 will be first converted to a range 0–255 by rounding. So it will be 255. Now, this value will be converted to a character value, i.e. ‘ÿ’ and it will be inserted in unsigned char.
// C program to show unsigned char 

#include <stdio.h> 

int main() 
{ 

 int chr = -1; 
 unsigned char i = chr; 
 printf("unsigned char: %c\n", i); 

 return 0; 
}

Output:

unsigned char: ÿ

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