Count Capital and Small Letters in C

Here is a sample program that I wrote using C programming language to count the occurrence of capital and small letters in a given sentence in C.

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Sample Program Output

Program Listing

count.c

#include <stdio.h>

#include <stdlib.h>

char count_captial_small(char *y)

{

 int upper_case_letters = 0, lower_case_letters = 0,counter=0;

   counter = 0;

   while (y[counter] != '\0') {

      if (y[counter] >= 'A' && y[counter] <= 'Z')

         upper_case_letters++;

      if (y[counter] >= 'a' && y[counter] <= 'z')

         lower_case_letters++;

    counter++;

   }

   printf("\n\n");

   printf("\t ===== DISPLAY RESULT =====");

   printf("\n\n");

   printf("\nNumber of Uppercase Letters ===> %d.", upper_case_letters);

   printf("\nNumber of Lowercase Letters ===> %d.", lower_case_letters);

   printf("\n\n");

   printf("\t Thank you for this program.");

   printf("\n\n");

}

int main() {

   char ch[255];

   printf("\tCount Capital and Small Letters in C");

   printf("\n\n");

   printf("\nKindly enter a Word or a Sentence :=> ");

   gets(ch);

   count_captial_small(ch);

   return (0);

}