Python variable names and keywords

A variable is a name that refers to a value.

>> message = 'Hello'
>>> n = 18
>>> pi = 3.1415

A first assigns a string to a new variable  named message the second assigns the integer 17 to n
the third assigns the value of pi.

you can use the print statement to display value.

>>> print(n)
18
>>> print(message)
Hello

Total 3 variables called string, integer and float.

Note:  I showed some example of illegal character.please check it out below.

you cannot define the number in value

>>> 1 = a
SyntaxError: can't assign to literal

class is one of python keyword you cannot use

>>> 1 = a
SyntaxError: can't assign to literal

more@ is an illegal character you cannot use

>>> 1 = a
SyntaxError: can't assign to literal

Additional example

1.swap variable value

>>>a, b = 1, 2 >>>a, b = b, a

>>>print('a')
2
>>>print('b)
1

2.Concatenation -> combine strings and integer

>>> print ‘red’ + str(3)

red3