Write a C Program to Check Whether A Character is Vowel or Consonant?
In this Program, the if…else statement is used to check whether an alphabet entered by the user is a vowel or a constant. The five alphabets A, E, I, O and U are called vowels. All other alphabets except these 5 vowel letters are called consonants.
This program assumes that the user will always enter an alphabetic character.
Write a C Program to Check Whether A Character is Vowel or Consonant?
#include <stdio.h>
int main()
{
char c;
int isLowercaseVowel, isUppercaseVowel;
printf("Enter an alphabet: ");
scanf("%c",&c);
// 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;
}
Output:
Case 1:
Enter an alphabet: G
G is a consonant.
Case 2:
Enter an alphabet: U
U is a vowel.
Explanation:
The character entered by the user is stored in variable c.
The isLowerCaseVowel evaluates to 1 (true) if c is a lowercase vowel and 0 (false) for any other character. Similarly, isUpperCaseVowel evaluates to 1(true) if c is an uppercase vowel and 0 (false) for any other character.
If both isLowercaseVowel and isUppercaseVowel is equal to 0, the test expression evaluates to 0 (false) and the entered character is a consonant.
However, if either isLowercaseVowel or isUppercaseVowel is 1 (true), the test expression evaluates to 1 (true) and the entered character is a vowel.
The program above assumes that the user always enters an alphabet. If the user enters any other character other than an alphabet, the program will not work as intended.
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