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Variables are containers for storing data values.
Python has no command for declaring a variable. A variable is created the moment you first assign a value to it.
Example x = 5 y = "John"
print(x)
print(y)Variables do not need to be declared with any particular type, and can even change type after they have been set.
Example x = 4 # x is of type int x = "Sally" # x is now of type str print(x)If you want to specify the data type of a variable, this can be done with casting.
Example x = str(3) # x will be '3'
Formula
y = int(3) # y will be 3 z = float(3) # z will be 3.0You can get the data type of a variable with the type() function.
Example x = 5 y = "John"
print(type(x))
print(type(y))You will learn more about data types and casting later in this tutorial.
String variables can be declared either by using single or double quotes:
Example x = "John" # is the same as x = 'John'
Formula
Variable names are case - sensitive.Formula
a = 4A = "Sally" #A will not overwrite a