In Python, variable names must start with a letter or underscore, are case sensitive and each word should be separated by an underscore. Variable names may only contain letters, numbers and underscores.
Python automatically interprets what type a variable is. A variable declaration is just:
diameter = 13 # An integer
radius = 6.5 # A float
shape = "Circle" # A string
complex_var = 2j # Complex
Notice, there are not any semi-colons at the end of the declaration as in other programming languages.
Assigning a variable a different value with a different type than it's previous definition, changes the variable's type.
radius = 6 # Radius is now an integer
The type of a variable can be found by:
type(radius)
A variable may be displayed on the screen by using the built in print function:
print(type(radius))
To convert a variable of one type to another type, cast the variable. Examples:
str_cast = str(diameter)
int_cast = int(shape)
float_cast = float(diameter)
More Python
Python automatically interprets what type a variable is. A variable declaration is just:
diameter = 13 # An integer
radius = 6.5 # A float
shape = "Circle" # A string
complex_var = 2j # Complex
Notice, there are not any semi-colons at the end of the declaration as in other programming languages.
Assigning a variable a different value with a different type than it's previous definition, changes the variable's type.
radius = 6 # Radius is now an integer
The type of a variable can be found by:
type(radius)
A variable may be displayed on the screen by using the built in print function:
print(type(radius))
To convert a variable of one type to another type, cast the variable. Examples:
str_cast = str(diameter)
int_cast = int(shape)
float_cast = float(diameter)
More Python
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