C Program to Count Vowels in Sentence

In this program, you will learn to count all vowels in a sentence (entered by the user).

Following example shows the output of the program:

Input: Hello C Programming
Output: 5 (vowels)

1 2	Input: Hello C Programming Output: 5 (vowels)

Example: Program Count Vowels in Sentence

#include<stdio.h>
#include<string.h>
int main()
{
    int i,vowelcount = 0;
    char str[100];
    printf("Enter a sentence or string: \n");
    gets(str);
    for(i = 0; i < strlen(str); i++) 
    {
        if(str[i]=='A'||str[i]=='a'||str[i]=='e'||str[i]=='E'
        ||str[i]=='I' ||str[i]=='i'||str[i]=='O'||str[i]=='o'
        ||str[i]=='U'||str[i]=='u') 
        {
            vowelcount++;
        }
    }
    printf("%d\n",vowelcount);
    //exit status
    return 0;
}

#include<stdio.h>

#include<string.h>

int main()

{

int i,vowelcount = 0;

char str[100];

printf("Enter a sentence or string: \n");

gets(str);

for(i = 0; i < strlen(str); i++)

{

if(str[i]=='A'||str[i]=='a'||str[i]=='e'||str[i]=='E'

||str[i]=='I' ||str[i]=='i'||str[i]=='O'||str[i]=='o'

||str[i]=='U'||str[i]=='u')

{

vowelcount++;

}

printf("%d\n",vowelcount);

//exit status

return 0;

}

When you run the program, the output will be following:

Enter a sentence or string:                                                                                                    
i am a programmer                                                                                                              
6

Enter a sentence or string:

i am a programmer