C Program to count number of vowels and consonants in a string

C Program to count number of vowels and consonants in a string using loop and conditional statement

#include <stdio.h>

void main()
{
  char str[50];
    int vowels = 0, consonants = 0, i;

  printf("Enter string: ");
  gets(str);

  for (i = 0; str[i] != '\0'; i++)
  {
    if ((str[i]>='a' && str[i]<='z') || (str[i]>='A' && str[i]<='Z'))
    {
      if (str[i] == 'a' || str[i] == 'e' || str[i] == 'i' || str[i] == 'o' || str[i] == 'u' || str[i] == 'A' || str[i] == 'E' || str[i] == 'I' || str[i] == 'O' || str[i] == 'U')
        vowels++;
      else
        consonants++;
    }

  }

  printf("\nNumber of vowels: %d\n", vowels);
  printf("Number of consonants: %d\n", consonants);
}

C Program to count number of vowels and consonants in a string using array and function

#include <stdio.h>

int isVowel(char);

void main()
{
  char str[50];
    int vowels = 0, consonants = 0, i;

  printf("Enter string: ");
  gets(str);

  for (i = 0; str[i] != '\0'; i++)
  {
    if (isVowel(str[i]))
      vowels++;
    else
      consonants++;
  }

  printf("\nNumber of vowels: %d\n", vowels);
  printf("Number of consonants: %d\n", consonants);
}

int isVowel(char ch)
{
  int i = 0;
  char vowels[] = {'a', 'e', 'i', 'o', 'u', 'A', 'E', 'I', 'O', 'U'};

  for (i = 0; i < sizeof(vowels); i++)
    if (vowels[i] == ch)
      return 1;
  return 0;
}

Output

Enter string: hello world
Number of vowels: 3
Number of consonants: 7