Introduction to Programming using Python and Jupyter

Python

is a Programming Language.

Jupyter

is an Interactive NoteBook

Adding two numbers

a + b

2 + 3 = 5

-2 + 2 = 0

How do we add two numbers in Python

Define a function called add that takes two inputs a and b

Compute the expression a + b and store it in result

Return the result



In [1]:

    
def add(a, b):
    result = a + b
    return result

Testing the function



In [2]:

    
add(2, 5)









    Out[2]:





7



In [3]:

    
add(-20, 30)









    Out[3]:





10

Adding an User Interface

So that we can interactively provide inputs

Display the result

Import the function



In [4]:

    
from ipywidgets import interact



In [5]:

    
interact(add, a=10, b=20)

Manually type the value for inputs



In [6]:

    
from ipywidgets.widgets import IntText



In [7]:

    
aText = IntText(min=0, max=10, value=2)
bText = IntText(min=0, max=10, value=2)

interact(add, a=aText, b=bText)

Subtracting two numbers



In [8]:

    
def sub(a, b, verbose=False):
    result = a - b
    
    if verbose:
        return "a - b = %s" % (result)
    else:
        return result



In [9]:

    
from ipywidgets.widgets import IntSlider



In [10]:

    
aSlider = IntSlider(min=-100, max=100, value=0)
bSlider = IntSlider(min=-100, max=100, value=0)

interact(sub,
         a=aSlider,
         b=bSlider,
         verbose=True,
        )









    












    





'a - b = -47'