C program to check a character is an alphabet, digit or special character

Q:-Write a C program to check a character is an alphabet, digit or special character.

In this section, we will see how to check whether a given character is number, or the alphabet or some special character in C.

The alphabets are from A – Z and a – z, Then the numbers are from 0 – 9. And all other characters are special characters. So If we check the conditions using these criteria, we can easily find them.

#include<stdio.h>
#include<conio.h>

void main() 
{
 char ch;
 clrscr(); 
 printf("\nEnter Any Character :");
 scanf("%c",&ch);
 if(ch>='0' && ch<='9')
 {
  printf("\n Entered Character is Digit");
 }
 else if(ch>='A' && ch<='Z')
 {
  printf("\n Entered Character is Capital Letter");
 }
 else if(ch>='a' && ch<='z')
 {
  printf("\n Entered Character is Small Letter");
 }
 else
 {
  printf("\n Entered Character is Special Character");
 }
getch();
 }

Output

Input a character from user. Store it in some variable say ch.

First check if character is alphabet or not. A character is alphabet if((ch >= ‘a’ && ch <= ‘z’) || (ch >= ‘A’ && ch <= ‘Z’)).

Next, check condition for digits. A character is digit if(ch >= ‘0’ && ch <= ‘9’).

Finally, if a character is neither alphabet nor digit, then character is a special character.

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