Adding mini project word counter

contrib/mini-projects/index.md

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 # List of sections
 
-- [Section title](filename.md)
+- [Word Counter](wordcounter.md)

contrib/mini-projects/wordcounter.md

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+# Word Counter
+This project counts the number of words entered in the input sentence and give the number (count) of words in output. 
+Each element present in the text will be considered a letter, and a group of letters with a space will be considered a word. 
+It takes string as input from user, and counts the total number of words in the string. This count is displayed as output.<br>
+Sample Input:- Harry likes Open Source<br>
+Sample Output:- 4<br>
+Explaination:- The above sentence contain 4 words.<br>
+
+# Components of the code:
+The provided code defines a Python function count_words(sentence) aimed at counting the number of words in a given sentence. Here's a step-by-step description:
+
+- ### Function Definition:
+
+  The code begins with the definition of a function named count_words.
+  It takes a single parameter sentence, representing the input string whose words are to be counted.
+- ### Splitting the Sentence:
+
+  Within the function, the input sentence is split into individual words using the split() method.
+  The split() method divides the string into substrings based on whitespace characters (spaces, tabs, and newline characters) by default.
+- ### Counting Words:
+
+  The code determines the number of words in the sentence by calculating the length of the list generated from splitting the sentence.
+  The len() function is utilized to compute the length of the list, which corresponds to the number of words in the sentence.
+- ### Returning the Count:
+
+  After determining the word count, the function returns this value.
+- ### Example Usage:
+
+  The script prompts the user to input a sentence using the input() function.
+  It then calls the count_words function, passing the user's input as an argument, and stores the returned word count in the variable number_of_words.
+  Finally, it prints out the number of words in the sentence.
+
+      def count_words(sentence):
+            # Split the sentence into words
+            words = sentence.split()
+
+            # Count the number of words
+            word_count = len(words)
+
+            return word_count
+
+      # Example usage:
+      sentence = input("Enter a sentence: ")
+      number_of_words = count_words(sentence)
+      print("Number of words:", number_of_words)
+