C++ Program to Check if a Character is a Vowel or Consonant

In this post, you’ll learn how to Check if a Character is a Vowel or Consonant in C++.

In this lesson, you will learn how to Check if a Character is a Vowel or Consonant, with decision making statements, logical operator (OR) and relational operator using the C++ language. Let’s look at the below source code.

How to check is a Character is a Vowel or Consonant?

Source Code

#include <iostream> 
using namespace std; 
int main() 
{ 
    char c; 
    cin >> c; 
    cout << "Enter a Character: "<< c <<endl; 
    
    if (c == 'a' || c == 'e' || c =='i' || c=='o' || c=='u' 
    || c=='A' || c=='E' || c=='I' || c=='O' || c=='U') 
    
      cout <<"\n"<< c << " is VOWEL"; 
    else 
      cout <<"\n"<< c <<" is CONSONANT";

return 0; 
}

Input

c

Output

Enter a Character
c is CONSONANT

#include <iostream>

• This line which is called the header file. #include statement tells the compiler to use available files and <iostream>is the name of the specific that we have used in this code. The <iostream> file stands for Input and Output statement.

using namespace std;

• The C++ has a standard library that has files for different functions and this line is used to access the standard file for input and output statements.

int main();

• This line usually controls the function of the code, as it calls the functions to perform their tasks.
• The int main()shows that the input value is a type of integer, once the program is executed the function returns to the main function, by using the statement ‘return 0;’.

{ }

• The opening ‘ { ‘ and the closing ‘ } ‘ curly braces mark the start and the finish of the main function
• Every statement and value between these braces belong to the main function.

The above statements are the main factors that support the function of the source code. Now we can look into the working and layout of the code’s function.

1. To start, we declare char c to store the character, the cout function is used to display the output statement and cin >> c stores the value entered by the user.
2. Using the relational operator (c == a) and logical operator (OR) ||, we give declare the condition (c == a) || (c == A) ,using the Vowels (both capital and small).
3. Then include them in the decision making if else statement.
4. The OR function sees if the first condition is satisfied, if not it moves to the next condition. When none of the conditions is satisfied in the if statement, then the else statement output is displayed.
5. If the condition is satisfied the character is a Vowel, else the character is a Consonant.
6. Using the statement cout<< c we display the character, along with the output statement.
7. End the function with return 0; this returns the function to main( ).

Note: The ‘ << endl ‘ in the code is used to end the current line and move to the next line and ‘\n’ is also a new line function, to understand how both the functions work exclude it from the code, move it around and work with it.

Additional Source Code

You can also try the source code given below, the following code is structured to find whether the Character is a Vowel or a Consonant along with an additional condition.

#include <iostream> 
using namespace std;
 
int main() 
{
    char c;
    cin >> c;
    cout << "Enter a Character: "<< c << endl;
 
    if (!isalpha(c))
    cout<<" \nEntered character '"<< c <<"' is a special character";
    
    else if
    (c == 'a' || c == 'e' || c =='i' || c=='o' || c=='u' || c=='A'
          || c=='E' || c=='I' || c=='O' || c=='U')
        
        cout <<"\n"<< c << " is VOWEL";
    else 
        cout <<"\n"<< c <<" is CONSONANT";
    
     
    return 0;
}

Input

+

Output

Enter a Character: +
Entered character '+' is a special character

• In this source code we use an additional function (!isalpha(c)) , this function checks whether the character is an alphabet or a special character.
• The first if else statement is executed and the output is displayed, if the first condition is satisfied.
• If the character is an alphabet then, the condition is not satisfied and it moves to the next if else statement. This is a nested if else statement, that is an if else statement has another if else statement in it.
• The rest is similar to the previous source code to find whether the Character is a Vowel or Consonant.