Count Vowels and Consonants in Pascal

A program that will ask the user to give a string or sentence and then the program will count the vowels and consonants in a given string or sentence using Pascal programming language.

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program CountVowelsAndConsonants;

var
   inputStr: string;
   numVowels, numConsonants: integer;
   i: integer;
   currentChar: char;

begin
   numVowels := 0;
   numConsonants := 0;
   writeln;
   write('Vowels and Consonants in Pascal');
   writeln;
   writeln;
   write('Enter a string: ');
   readln(inputStr);
   
   for i := 1 to length(inputStr) do begin
      currentChar := upcase(inputStr[i]);
      if (currentChar >= 'A') and (currentChar <= 'Z') then begin
         if (currentChar = 'A') or (currentChar = 'E') or (currentChar = 'I') or (currentChar = 'O') or (currentChar = 'U') then begin
            numVowels := numVowels + 1;
         end
         else begin
            numConsonants := numConsonants + 1;
         end;
      end;
   end;
   
   writeln;
   writeln('The number of vowels in the string is: ', numVowels);
   writeln('The number of consonants in the string is: ', numConsonants);
    writeln;
   write('End of Program');
   writeln;
   readln;
end.