Added a function file with example

Author: DhawalChaturvedi

other/functions.py

@@ -0,0 +1,59 @@
+"""
+A pure Python implementation of Functions 
+
+A Function in python is a reusable piece of code that takes N parameters and can be called as many times as we want.
+Functions are important because:
+    1) They make our code clean
+    2) They make our code small
+    3) It improves performance
+For example : A function to add two numbers a and b will have two parameters a and b
+
+"""
+
+def addition(a ,b):
+    """
+    A function in python is created with a keyword 'def' in all small , followed with the name of the function for example in here addition
+    and in the brackets we pass on the parameter's value the function will work upon 
+
+    """
+    return a + b
+
+    """
+    The return keyword as the name suggests returns the result of the function in here it returns the value of addition of a and b
+
+    """
+
+print(addition(4,5))
+
+"""
+To call a function you type in the function's name and pass on the values that you want your function to pass
+For example : Result for this case will be 9 as  4 + 5 here automatically the function assumes a = 4 and b = 5  
+another way to call a function is to specify the values for example print(addition(a=4 ,b= 5))
+
+"""
+
+
+"""
+
+Another function for example can be to print every item in a list
+For example
+
+"""
+
+def each_item_in_list(list):
+    for item in list:
+        print(item)
+        """
+        Here the function takes takes the parameter 'list' and this function when called upon will print every item of the list
+        """
+each_item_in_list([1,2,3,4,5,6])
+
+"""
+Upon calling the function the result will be
+1
+2
+3
+4
+5
+6
+"""