C Program to Check Character is Alphabet Digit or Special Character

How to Write a C Program to Check Whether the Character is Alphabet, Digit, or a Special Character with an example. For this, we are going to use the Built-in functions isalpha, isdigit, and ASCII Codes.

C Program to Check Character is Alphabet Digit or Special Character using else if

This C program allows the user to enter one character. Then, it will check whether the character is an Alphabet, digit, or Special Character.

In this example, we are going to use C Programming built-in functions isalpha and isdigit to find whether the character is an Alphabet or a Digit. If both conditions fail, it is a special char.

/* C Program to check Character is Alphabet Digit or Special Character */
 
#include <stdio.h>
#include<ctype.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;
}

Alphabet, Digit, or Special Character output.

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

 Please Enter any character :  9

 9 is a Digit

Let us check Special Character

 Please Enter any character :  @

 @ is a Special Character

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

In this program, to check the Alphabet, digit, or special character, we use the alphabet 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;
}

Check Character is an Alphabet, Digit, or Special Character using ASCII values

In this program, we are using the ASCII Table values to check whether the input character is an Alphabet, Digit, or special 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;
}

Let us check whether 3 is a Digit or not

 Please Enter any character :  3

 3 is a Digit

Let us check whether $ is a special character or not

 Please Enter any character :  $

 $ is a Special Character