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count letters numbers and characters

By Obedient OcelotObedient Ocelot on Jan 22, 2021
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<str.length()){
      char ch = str.charAt(i);
      // if current character is a digit
      if (Character.isDigit(ch))
         num ++;
         // if current character is an alphabet
      else {
         letter++;
      }
      i++;
   }
   System.out.println(letter + " letters -> "+num +
                      " numbers -> "+ (total-letter-num) + " other chars");
}  

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