C Program to Find Total of Even Integers

C Program for Testing Character Type Use of getchar Function

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In this Example, gives How to write Testing Character Type Use of getchar Function with an example.

The program of below requests the user to enter a character and displays a message on the screen telling the user whether the character is an alphabet or digit, or any other special character.

This program receives a character from the keyboard and tests whether it is a letter or digit and prints out a message accordingly. These tests are done with the help of the following functions:

  1. isalpha(character)
  2. isdigit(character)

For example, isalpha assumes a value non-zero (TRUE) if the argument character contains an alphabet; otherwise it assumes 0 (FALSE). Similar is the case with the function isdigit.

Testing Character Type Use of getchar Function

#include <stdio.h>
#include <ctype.h>
main()
{
       char character;
       printf("Press any key\n");
       character = getchar();
   if (isalpha(character) > 0)
   printf("The character is a letter.");
else
   if (isdigit (character) > 0)
   printf("The character is a digit.");
else
   printf("The character is not alphanumeric.");
}

Output:

Press any key
h
The character is a letter.
Press any key
5
The character is a digit.
Press any key
*
The character is not alphanumeric.

Let me know if you find any difficulty in understanding this example and I would be glad to explain it further.

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