count letters code example

Example 1: count vowels

vow = ['a', 'A', 'e',
          'E', 'i', 'I',
          'o', 'O', 'U',
          'u', 'Y', 'y']

def vowels(str):
  
  global vow
  string = list(str)
  count = 0
  
  for i in range(len(string)):
    
    if string[i] in vow:
      
      count += 1
  return count

Example 2: count letters numbers and characters

public static String countLetter(String str){
    String abc=str;
    int a=0,b=0;
    while(str.length()>0){
        int i=0;
        String ch=str.substring(i,i+1);
        if(ch.matches(".*[a-zA-Z].*")){
            a++;
        }else if (ch.matches(".*[0-9].*")){
            b++;
        }
        str=str.substring(i+1);
    }
    return abc + " has "+a+" letters "+b+" digit 
          and "+(abc.length()-(a+b))+" other characters ";
      
      
OR+++++++++++++++++++++++++++++++++
      
      
  static void findSum(String str)
{
   int total= str.length();
   str = str.replaceAll("\\s", "");
   int num =0;
   int letter=0;
   int i=0;
   while(i "+num +
                      " numbers -> "+ (total-letter-num) + " other chars");
}