C Program to Check Vowel or Consonant using predefined function

Learn about C Program to Check Vowel or Consonant using predefined function in the below code example. Also refer the comments in the code snippet to get a detailed view about what’s actually happening.

Contents

C Program to Check Vowel or Consonant using predefined function

tolower(c): If the c is a capital letter, it returns the lowercase equivalent; otherwise, it returns c.

toupper(c): It gives you the uppercase version. If the c is a lowercase letter, it yields c; otherwise, it returns c.

When using the tolower() function, we must only look for lowercase letters and not capital letters. We can now utilise an if-else or switch-case statement.

Source code:

#include<stdio.h>
#include<ctype.h>
int main()
{
   char ch;
   int result;

   printf("Enter any character: ");
   scanf("%c",&ch);

   ch = tolower(ch);
   result = (ch=='a'||ch=='e'||ch=='i'||ch=='o'||ch=='u');

   switch(result)
   {
   case 1:
     printf("Vowel\n");
     break;
   case 0:
     printf("Consonant\n");
     break;
   default:
     printf("Invalid character\n");
     break;
   }

   return 0;
}

Output:

Enter any character: A
Vowel

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