A vowel is the alphabets that represents a speech sound created by the relatively free passage of breath through the larynx and oral cavity. Letters that are not vowels are consonants. English has five proper vowel letters (A, E, I, O, U) all alphabets except these characters are consonants.
C Program to check whether an input character is vowel or consonant
In the following program, we take a character as input from user and store in variable c. Then, we check whether it is any one of these ten characters(lower and upper case vowels) a, A, e, E, i, I, o, O, u and U using || operator. If input character is any one of these ten vowel characters, then it is a vowel otherwise a consonant.
#include <stdio.h>
int main(){
char c;
printf("Enter a Character: ");
scanf("%c", &c);
if(c == 'a'||c == 'e'||c =='i'||c=='o'||c=='u'||c=='A'
||c=='E'||c=='I'||c=='O'||c=='U'){
printf("%c is a Vowel\n", c);
} else {
printf("%c is a Consonant\n", c);
}
return 0;
}
Output
Enter a Character: A A is a Vowel
Enter a Character: D D is a Consonant
C program to check whether a character is vowel or consonant using function
In this program, we first check whether input alphabet is lower case or not using "isLowerCase" function which returns 1 if passed character is lower case character. Then we convert lower case characters to their corresponding upper case character by subtracting 32.
Difference between the ASCII value of any lower case character and it's corresponding upper case character is 32 ('A' + 32 = 'a'). After conversion of lower to upper case char, it checks whether it is vowel or consonant using isVowel function.
Difference between the ASCII value of any lower case character and it's corresponding upper case character is 32 ('A' + 32 = 'a'). After conversion of lower to upper case char, it checks whether it is vowel or consonant using isVowel function.
#include <stdio.h>
#define LOWERCASE_TO_UPPERCASE_DIFFERENCE 32
int isVowel(char c);
int isLowerCase(char c);
int main(){
char c;
printf("Enter a Character: ");
scanf("%c", &c);
if(isVowel(c)){
printf("%c is a Vowel\n", c);
} else {
printf("%c is a Consonant\n", c);
}
return 0;
}
int isVowel(char c){
if(isLowerCase(c))
c = c - LOWERCASE_TO_UPPERCASE_DIFFERENCE;
if (c == 'A'||c == 'E'||c == 'I'||c == 'O'||c == 'U')
return 1;
else
return 0;
}
int isLowerCase(char c){
if(c >= 'a' && c<= 'z')
return 1;
else
return 0;
}
Output
Enter a Character: e e is a Vowel
Enter a Character: f f is a Consonant
C Program to check whether an alphabet is vowel or consonant using switch statement
To understand this program, you should have knowledge of Switch Statements
#include <stdio.h>
int main(){
char c;
printf("Enter a Character: ");
scanf("%c", &c);
switch(c)
{
case 'A':
case 'E':
case 'I':
case 'O':
case 'U':
case 'a':
case 'e':
case 'i':
case 'o':
case 'u':
printf("%c is a Vowel\n", c);
break;
default:
printf("%c is a Consonant\n", c);
}
return 0;
}
Output
Enter a Character: A A is a Vowel
Related Topics