Day 4 - None Datatype & input() function in Python

None Datatype:

The Python NoneType is a data type that represents the absence of a value. In Python, the NoneType is represented by the keyword "None".

Example:

In this example the function is called , so inside the function will be printed.

def display():

    print("hello")

display()

Output:

hello

Example 2:

In this example the function is does not return any value. so the print(display()) is become 'None'.

def display():

    print("hello")

print(display())

Output:

hello

None

Example 3:

In this example the return statement will be used to return the value(i.e 30). If we not use any return statement the output will be 'None'.

def display():

    print("hello")

    return 10+20

print(display())

Output:

hello

30

input() function:

The builtin function input() in Python takes input from a user and returns it as a string by default.

Example:

name = input("Enter your name: ")

print("Welcome to Python", name)

print(type(name))

Output:

Enter your name: Pritha

Welcome to Python Pritha

<class 'str'>