Eventually, we want interactivity when executing Python script. We want user to give input for some variable. It'll useful for, lets call, application form where user have to input her/his name, age, etc. On math field, user will have flexibility to input the function and range of variable used to computation.



There is raw_input command and input command we can used.

raw_input command will translate all we type to string, while input command treat it as command

Here difference between the two

raw_input

x=raw_input('type anything \n')
print 'you typed ', x

Execute it

Nugrohos-MacBook-Pro:python nugroho$ python input.py 
type anything 
a
you typed  a
Nugrohos-MacBook-Pro:python nugroho$ python input.py 
type anything 
12
you typed  12
Nugrohos-MacBook-Pro:python nugroho$ python input.py 
type anything 
sin(x)+x**2   
you typed  sin(x)+x**2
Nugrohos-MacBook-Pro:python nugroho$ 

input

c='sin(x)+x**2'
me='Hello folks, Aravir here'
x=input('type anything \n')
print 'you typed ', x 

Execute it

Nugrohos-MacBook-Pro:python nugroho$ python input.py 
type anything 
a
Traceback (most recent call last):
  File "input.py", line 3, in 
    x=input('type anything \n')
  File "", line 1, in 
NameError: name 'a' is not defined
Nugrohos-MacBook-Pro:python nugroho$ python input.py 
type anything 
12
you typed  12
Nugrohos-MacBook-Pro:python nugroho$ python input.py 
type anything 
sin(x)+x**2   
Traceback (most recent call last):
  File "input.py", line 3, in 
    x=input('type anything \n')
  File "", line 1, in 
NameError: name 'sin' is not defined
Nugrohos-MacBook-Pro:python nugroho$ python input.py 
type anything 
c
you typed  sin(x)+x**2
Nugrohos-MacBook-Pro:python nugroho$ python input.py 
type anything 
me
you typed  Hello folks, Aravir here
Nugrohos-MacBook-Pro:python nugroho$