Added contribution note in README

README.md

@@ -10,3 +10,5 @@ This repository will contain basic python programming questions and their soluti
 - Please run the program and check if there are no errors before making the PR
 - Review other PR's as well
 - No Spamming allowed, make sure to include all programs in one PR.
+- This is my first contribution on Github
+- Add a new program which convert the integer number in words 

adding_error_message.py

@@ -0,0 +1,8 @@
+try:
+    num1 = int(input("Enter First Number: "))
+    num2 = int(input("Enter Second Number: "))
+    num3 = int(input("Enter Third Number: "))
+    print("The sum of the three numbers is:", num1 + num2 + num3)
+except ValueError:
+    print("Invalid input! Please enter valid integers only.")
+    exit()

number_to_word_convertor.py

@@ -0,0 +1,28 @@
+ # In this program we will convert numbers to words
+ # For example: 123 -> One Two Three
+def number_to_words(number):
+# Define a mapping of digits to words
+    digit_to_word = {
+        '0': 'Zero',
+        '1': 'One',
+        '2': 'Two',
+        '3': 'Three',
+        '4': 'Four',
+        '5': 'Five',
+        '6': 'Six',
+        '7': 'Seven',
+        '8': 'Eight',
+        '9': 'Nine'
+    }
+    result=[]
+    # Convert the number to string to iterate over each digit
+    for digit in str(number):
+        if digit in digit_to_word:
+            result.append(digit_to_word[digit])
+        else:
+            return "Invalid input! Please enter a valid non-negative integer."
+    return ' '.join(result)
+# Example usage
+if __name__ == "__main__":
+    number = int(input("Enter a non-negative integer: "))
+    print("Number in words:", number_to_words(number))