#!/usr/bin/env python
# coding: utf-8

# In[9]:


def add(i,j):
    return i+j


# In[7]:


def sub(i,j):
    return i-j


# In[8]:


def mul(i,j):
    return i*j


# In[4]:


def div(i,j):
    if(j!=0):
        return i/j
    else:
        return "not divisible by zero"


# In[ ]:




