Write a program to check whether the entered character is capital, small letter, digit or any special character

Write a C program to input a character from user and check whether given character is alphabet, digit or special character using if else. How to check if a character is alphabet, digits or any other special character using if else in C programming. Logic to check alphabet, digit or special character in C programming.

  • A character is alphabet if it in between 'a-z' or 'A-Z'.
  • A character is digit if it is in between '0-9'.
  • A character is special symbol character if it neither alphabet nor digit.

Let us implement the above logic in a C program.

  •  Program:

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

int main()
{
    char a;

    printf("Enter the character : ");
    scanf("%c",&a);

    if(a>=97 && a<=122) //ascii value : a=97 , z=122
    printf("the character is small");
    
    else if(a>=65 && a<=90) //ascii value : A=65 , Z=90
    printf("the character is capital");

    else if(a>=48 && a<=57) //ascii value : 0=48 , 9=57
    printf("the character is digit");

    else
    printf("the character is special");

    getch();
    return 0; 
    
}

  •  Output:

 
Enter the character : patel
the character is small

Enter the character : NILESH
the character is capital

Enter the character : 123
the character is digit

  •  Explain:

  1. Input a character from user. Store it in some variable say 'a'.
  2. First check if character is alphabet or not. A character is alphabet if(a>=97 && a<=122) || else if(a>=65 && a<=90).
  3. Next, check condition for digits. A character is digit else if(a>=48 && a<=57).
  4. Finally, if a character is neither alphabet nor digit, then character is a special character.
 
  •  Visit:

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