Counting number of vowels,consonants and digits in a string:

In this program we are counting how many vowels ,consonants and digits are in the string which will be entered by the user. After user inputs a string , string will be iterated from 0th index to last index means until it not terminate with null.

• The variable vowel will count the number of vowels and variable con will count the number of consonants in the string.
• Digit variable will count the number of digits in a string.

#include<string.h>
void main()
{
 char str[10];
 int b,digit,vowel,e,i,l,con;
 b=digit=vowel=e=0;


printf("\n\t Enter any string :");
 scanf("%s",str);

for(i=0;str[i]!='\0';i++)
  {
   if((str[i]>=65&&str[i]<=90||str[i]>=97&&str[i]<=122))
   b++; 
   if(str[i]>=48&&str[i]<=57)
   digit++; // digit variable will be incremented if digits found
   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')
   vowel++; // vowel variable will be incremented if vowels found
      if (str[i]==' ')
   e++;
   }
   con=b-vowel; // it will count the number of consonants in the string

printf("\n\t No of vowels=%d \n",vowel);
   printf("\n\t No of consonants=%d \n ",con);
   printf("\n\t No of digits=%d \n",digit);

}