How to Run First Program in Python
When you are a first-time learner of Python, the below commands you can try on windows Python-interpreter. Python is a powerful and multipurpose language.
At the highest level, Python is an interpreted language. And you don't need declarations for:
You don't need a compiler. During the run-time, the Python interpreter validates the code and shows-up errors.
At the highest level, Python is an interpreted language. And you don't need declarations for:
- Variables
- Methods
- Parameters
- Functions
You don't need a compiler. During the run-time, the Python interpreter validates the code and shows-up errors.
How to Run First Program in Python.
$ python ## Run the Python interpreter
Python 2.7.9 (default, Dec 30 2014, 03:41:42) [GCC 4.1.2 20080704
(Red Hat 4.1.2-55)] on linux2Type "help", "copyright",
"credits" or "license" for more information.
>>> a = 6 ## set a variable in this interpreter session
>>> a ## entering an expression prints its value
6
>>> a + 2
8
>>> a = 'hi' ## 'a' can hold a string just as well
>>> a'hi'
>>> len(a) ## call the len() function on a string
2
>>> a + len(a) ## try something that doesn't work
Traceback (most recent call last):
File "", line 1, in
TypeError: cannot concatenate 'str' and 'int' objects>>>
a + str(len(a))
## probably what you really wanted
'hi2'
>>> foo ## try something else that doesn't work
Traceback (most recent call last):
File "", line 1, in
NameError: name 'foo' is not defined
>>> ^D ## type CTRL-d to exit
(CTRL-z in Windows/DOS terminal)
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