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Write a C Program to Check Vowel or consonant until the user enters an Alphabet?



The program below asks the user to enter a character until the user enters an alphabet. Then, the program checks whether it is a vowel or a consonant.


Write a C Program to Check Vowel or consonant until the user enters an Alphabet?


#include <stdio.h>

int main()

{

char c;

int isLowercaseVowel, isUppercaseVowel;

do {

printf("Enter an alphabet: ");

scanf(" %c", &c);

} while (!isalpha(c)); /* isalpha() returns 0 if the passed character is not an alphabet evaluates to 1 (true) if c is a lowercase vowel. */

isLowercaseVowel = (c == 'a' || c == 'e' || c == 'i' || c == 'o' || c == 'u');

// evaluates to 1 (true) if c is an uppercase vowel

isUppercaseVowel = (c == 'A' || c == 'E' || c == 'I' || c == 'O' || c == 'U');

/* evaluates to 1 (true) if either isLowercaseVowel or isUppercaseVowel is true */

if (isLowercaseVowel || isUppercaseVowel)

printf("%c is a vowel.", c);

else

printf("%c is a consonant.", c);

return 0;

}


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