input() and raw_input()
In Python 2.x there are two functions for input.
- input(): Takes expression as input. If you typed in 2+3 and print. It will show 5.
- raw_input(): Takes string as input. For above example, output will be '2+3'. However, we can change its data type later.
Python 3.x has eliminated input() and named raw_input() as input(). Basically it has only one function for taking data from user and that is input() explained below.
(If you are using Python 2.x you can refer below description for raw_input(). It works the same.)
This function takes input as a string. If you want input in other formats you need to convert them to respective data types.
Type this in script mode and you'll see a cursor blinking in the next line. Input text is entered here. But where does it go? You better do this!
>>>a = input()
Now, the input is stored in variable a. Let's print it and check if that's true.
Yeah. It works!
You can also use a prompt for input. Like this one:
>>>a = input('Enter a string: ')
Enter a string: Input string
What if you typed in numbers?
>>>b = input()
The quotes on 22 signifies it is a string. But one must always be sure.
TypeError: cannot concatenate 'str' and 'int' objects
Hence proved. b is a string. Haha.
What if one want numbers as input. There's always a way. We'll see that soon after discussing data types in Python.
Happy weekend peeps!