Article: Python Input() Function

Python-Input.md

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+# Python Input() Function
+
+Many a time, in a program we need some input from the user. Taking inputs from the user makes the program feel interactive. In Python 3, to take input from the user we have a function `input()`. Let's see some examples:
+
+1. When we just want to take the input:
+```python
+# This will just give a prompt without any message
+inp = input()
+```
+[Run Code](https://repl.it/CUqX/0) :rocket:
+
+2. To give a prompt with a message:
+```Python
+prompt_with_message = input('<Your prompt message should appear here>')
+# <Your prompt message should appear here> _
+# The '_' in the output is the prompt
+```
+[Run Code](https://repl.it/CUqX/1) :rocket:
+
+3. When we want to take an integer input:
+```Python
+number = int(input('Please enter a number: '))
+```
+[Run Code](https://repl.it/CUqX/2) :rocket:
+
+If you enter a non integer value then Python will throw an error `ValueError`. **So whenever you use this, please make sure that you catch it too.** Otherwise, your program will stop unexpectedly after the prompt.
+```Python
+number = int(input('Please enter a number: '))
+# Please enter a number: as
+# Enter a string and it will throw this error
+# ValueError: invalid literal for int() with base 10 'as'
+```
+
+4. When we want a string input:
+```python
+string = str(input('Please enter a string: '))
+```
+[Run Code](https://repl.it/CUqX/3) :rocket:
+
+Though, inputs are stored by default as a string. Using the `str()` function makes it clear to the code-reader that the input is going to be a 'string'. It is a good practice to mention what type of input will be taken beforehand.
+
+[Official Docs](https://docs.python.org/3/library/functions.html#input)