C Program to Count Number of Vowels in a string

By | 08.11.2016

Count Number of Vowels in a string

Write a C Program to Count Number of Vowels in a string. Here’s simple Program to Count Number of Vowels in a string in C Programming Language.

C – Strings : 

Strings are actually one-dimensional array of characters terminated by a null character ‘\0’. Thus a null-terminated string contains the characters that comprise the string followed by a null.

String is a sequence of characters. char data type is used to represent one single character in C. So if you want to use a string in your program then you can use an array of characters.

The declaration and definition of the string using an array of chars is similar to declaration and definition of an array of any other data type.

Any string ends with a terminating null character ‘\0’. An array definition in such a way should include null character ‘\0’ as the last element.

Here is source code of the C Program to Count Number of Vowels in a string. The C program is successfully compiled and run(on Codeblocks) on a Windows system. The program output is also shown in below.


/*  C Program to Count Number of Vowels in a string  */

int main()
    char line[150];
    int i,v,c,ch,d,s,o;

    printf("\nEnter any String :: ");

        if(line[i]=='a' || line[i]=='e' || line[i]=='i' || line[i]=='o' || line[i]=='u' || line[i]=='A' || line[i]=='E' || line[i]=='I' || line[i]=='O' || line[i]=='U')
        else if((line[i]>='a'&& line[i]<='z') || (line[i]>='A'&& line[i]<='Z'))
        else if(line[i]>='0'&& line[i]<='9')
        else if (line[i]==' ')
    printf("\nNumber of Vowels :: [ %d ]\n",v);
    printf("\nNumber of Consonants :: [ %d ]\n",c);
    printf("\nNumber of Digits :: [ %d ]\n",d);
    printf("\nNumber of White spaces :: [ %d ]\n",s);

    return 0;


/*  C Program to Count Number of Vowels in a string  */

Enter any String :: admin123@codezclub.com

Number of Vowels :: [ 6 ]

Number of Consonants :: [ 11 ]

Number of Digits :: [ 3 ]

Number of White spaces :: [ 0 ]

Process returned 0

Above is the source code for C Program to Count Number of Vowels in a string which is successfully compiled and run on Windows System.The Output of the program is shown above .

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About Tunde A

My name is Tunde Ajetomobi, a Tech Enthusiast and Growth Hacker. I enjoy creating helpful content that solves problem across different topics. Codezclub is my way of helping young aspiring programmers and students to hone their skills and find solutions on fundamental programming languages.

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