isalnum function

By: adarshsojitra on 18:29

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isalnum function is used to determine weather entered character is alpha-numeric or not.Let us see example for this program.

Example:

#include<stdio.h>
#include<conio.h>
#include<ctype.h>
main()
{
        char ch;
        clrscr();
        printf("Enter any character: ");
        scanf("%c",&ch);
        if(isalnum(ch))
        {
                printf("\nThis character is alpha-numeric");
        }
        else
        {
                printf("\nThis character is not alpha-numeric");
        }
        getch();

}