Python_Variable 





example:1

x = 15

x = "Roman"

print(x)

Variable cannot start with a number

so  the output of this program is ‘Roman’


A variable name must start with a letter or the underscore character.

A variable name cannot start with a number.

A variable name can only contain alpha-numeric characters and underscores (A-z,
0-9, and _).

Variable names are case-sensitive (abc, Abc and ABC are three different
variables).

The most important things is, it is case sensitive.



example:2

x = "Roman "

y = "is a Boy"

z =  x + y

print(z)

Output: Roman is a Boy

in this case,'+' character used for adding one variable to another variable.




example:3

x = 2

y = 5

print(x + y)

Output: 7

 '+' character used as mathmatical
operator.

Example:4

x = 56                              #int type
y = "Roman"                    #string type
print(x + y)

Output: Error

one is 'int' type another is 'string' type ,we cannot add a string with
integer

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