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C Example for Beginners: C Program to Check Whether a Character is an Alphabet or not

By on Wednesday, March 17, 2021

(C programming Example for Beginners)

C Program to Check Whether a Character is an Alphabet or not

In this example, you will learn to check whether a character entered by the user is an alphabet or not.

In C programming, a character variable holds an ASCII value (an integer number between 0 and 127) rather than that character itself.

The ASCII value of the lowercase alphabet is from 97 to 122. And, the ASCII value of the uppercase alphabet is from 65 to 90.

If the ASCII value of the character entered by the user lies in the range of 97 to 122 or from 65 to 90, that number is an alphabet.

 

Program to Check Alphabet


#include <stdio.h>
int main(){
    char c;
    printf("Enter a character: ");
    scanf("%c", &c);

    if ((c >= 'a' && c <= 'z') || (c >= 'A' && c <= 'Z'))
        printf("%c is an alphabet.", c);
    else
        printf("%c is not an alphabet.", c);

    return 0;
}

Output

Enter a character: *
* is not an alphabet

 

In the program, 'a' is used instead of 97 and 'z' is used instead of 122. Similarly, 'A' is used instead of 65 and 'Z' is used instead of 90.

Note: It is recommended to use the isalpha() function to check whether a character is an alphabet or not.

 

C Example for Beginners: C Program to Check Whether a Character is an Alphabet or not

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Disclaimer: The information and code presented within this recipe/tutorial is only for educational and coaching purposes for beginners and developers. Anyone can practice and apply the recipe/tutorial presented here, but the reader is taking full responsibility for his/her actions. The author (content curator) of this recipe (code / program) has made every effort to ensure the accuracy of the information was correct at time of publication. The author (content curator) does not assume and hereby disclaims any liability to any party for any loss, damage, or disruption caused by errors or omissions, whether such errors or omissions result from accident, negligence, or any other cause. The information presented here could also be found in public knowledge domains.
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