Answer :

#include<stdio.h>   //header file contains the function,decleraction and macro defination of key words used in code.

int main ()

{

char a;   //adressing the variables

printf("Enter any alphabet or a number you like\t");  //output

scanf("%c",&a); //stores the input from the user

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

{

printf("%c is an alphabet",a); //output

}

else if (a>='0' && a<='9')  //condition

{

printf("%c is number",a); //output

}

else 

{

printf("%c is a symbol",a); //output

}

}

Output :