Code improvements

Author: joseph-alan-jose

Simple calculator.py

@@ -1,4 +1,4 @@
-# Program make a simple calculator
+# Program to make a simple calculator
 
 # This function adds two numbers
 def add(x, y):
@@ -14,6 +14,8 @@ def multiply(x, y):
 
 # This function divides two numbers
 def divide(x, y):
+    if(y==0):
+        raise Exception("Divisor cannot be zero")
     return x / y
 
 

binary search.py

@@ -4,19 +4,19 @@ def binarySearchAppr (arr, start, end, x):
       mid = start + (end- start)//2
       # If element is present at the middle
       if arr[mid] == x:
-      return mid
+         return mid
       # If element is smaller than mid
       elif arr[mid] > x:
-      return binarySearchAppr(arr, start, mid-1, x)
+         return binarySearchAppr(arr, start, mid-1, x)
       # Else the element greator than mid
       else:
-      return binarySearchAppr(arr, mid+1, end, x)
+         return binarySearchAppr(arr, mid+1, end, x)
    else:
       # Element is not found in the array
       return -1
 arr = sorted(['t','u','t','o','r','i','a','l'])
-   x ='r'
-   result = binarySearchAppr(arr, 0, len(arr)-1, x)
+x ='r'
+result = binarySearchAppr(arr, 0, len(arr)-1, x)
 if result != -1:
    print ("Element is present at index "+str(result))
 else:

create password validity in python.txt renamed to create password validity in python.py

@@ -1,4 +1,4 @@
-cclass Node:
+class Node:
     def __init__(self, data):
         self.data = data
         self.next = None