Write a program to check whether a character is alphabet or not

A character is said to be an alphabet if it is from A-Z or a-z.

We will see this program using two ways, i.e., using the character and using the ASCII(American Standard Code foo Information Interchange).

A-Z ----- 65-90

a-z  -----  97-122

By directly checking the inputted character:-

  #include<stdio.h>

    void main()

     {

        char ch;

        printf("Enter a character:");

        scanf("%c", &ch);

        if( (ch>='a' && ch<='z') || (ch>='A' && ch<='Z') ) 

        printf("Character is an alphabet.");

        else

        printf("Character is not an alphabet."); 

      }

By using ASCII value of the character:-

  #include<stdio.h>

    void main()

      {

         char ch;

         printf("Enter a character:");

         scanf("%c", &ch);

          

        if( (ch >= 65 && ch <=90) || (ch >=97 && ch <= 122) )

        printf("Character is an alphabet.");

        else

        printf("Character is not an alphabet."); 

      }