Question

I am a newbie to programmimg and python.
When I do:

 j = 100
 k = 200
 l = j + k
 l
 300

Now, if I change the value of J, I expect the output of ‘l’ to be different. Why is the output same and how can I make it change.

 j = 250
 l
 300

Answer 1

That’s not what “dynamic” means. Once a value is assigned to a variable, the variable retains that value until it is assigned a different value.

Dynamic languages are those whose variables can take on any type at runtime, and usually can even hold multiple values of different types over their lifespan:

a = 1
print a
a = "hello"
print a

That said, you can achieve something similar to what you expected:

>>> j = 100
>>> k = 200
>>> l = lambda: j + k
>>> l()
300
>>> j = 250
>>> l()
450