C Program to Check Character is Alphabet Digit or Special Character

In this article, we will show you, How to write a C Program to Check Character is Alphabet Digit or Special Character with example. For this we are going to use Built-in function isalpha, isdigit, and ASCII Codes.

C Program to Check Character is Alphabet Digit or Special Character Example 1

This program allows the user to enter one character. And then it will check whether the character is Alphabet, digit, or Special Character. In this example, we are going to use built-in functions isalpha, and isdigit to check whether the character is Alphabet or Digit

/* C Program to check Character is Alphabet Digit or Special Character */
 
#include <stdio.h>
 
int main()
{
	char ch;
  	
	printf(" Please Enter any character :  ");
  	scanf("%c", &ch);
  
  	if (isalpha(ch))
  	{
  		printf("\n %c is an Alphabet", ch);  	
  	} 
  	else if (isdigit(ch))
  	{
  		printf("\n %c is a Digit", ch);  	
  	}
  	else
    	printf("\n %c is a Special Character", ch);
  
  	return 0;
}

OUTPUT

Let us check whether 9 is an Alphabet or Digit or Special Character

Let us check Special Character

C Program to Check Character is Alphabet Digit or Special Character Example 2

In this program we are using the alphabets and digits directly inside the Else If Statement.

/* C Program to check Character is Alphabet Digit or Special Character */
 
#include <stdio.h>
 
int main()
{
  	char ch;
  	
  	printf(" Please Enter any character :  ");
  	scanf("%c", &ch);
  
  	if( (ch >= 'a' && ch <= 'z') || (ch >= 'A' && ch <= 'Z') )
  	{
  		printf("\n %c is an Alphabet", ch);  	
 	}
  	else if (ch >= '0' && ch <= '9')
  	{
  		printf("\n %c is a Digit", ch);  	
  	}    
  	else
    	printf("\n %c is a Special Character", ch);
  
  	return 0;
}

OUTPUT

C Program to Check Character is Alphabet Digit or Special Character Example 3

In this program we are using the ASCII values to check whether the input character is Alphabet or Digit or special character. I suggest you to refer ASCII Table to under the ASCII values of each and every character.

/* C Program to check Character is Alphabet Digit or Special Character */
 
#include <stdio.h>
 
int main()
{
  	char ch;
  	
  	printf(" Please Enter any character :  ");
  	scanf("%c", &ch);
  
 	if (ch >= 48 && ch <= 57)
  	{
  		printf("\n %c is a Digit", ch);  	
  	}
  	else if ( (ch >= 65 && ch <= 90) || (ch >= 97 && ch <= 122) )
  	{
  		printf("\n %c is an Alphabet", ch);  	
  	}    
  	else
    	printf("\n %c is a Special Character", ch);
  
  	return 0;
}

OUTPUT

Let us check whether 3 is a Digit or not

Let us check whether $ is a special character or not

Thank you for visiting Our Blog