Python Tutorial
Variables and Data Types:
In programming, a variable is a named location used to store data
in memory. It is called a variable because its value can vary throughout the
execution of a program. Variables must be given unique names, called
identifiers. In Python, variable names are case sensitive and cannot start with
a number. They can contain letters, numbers, and underscores.
For example, let's say we want to store the number of apples I have in a
variable named apples. We can do this with the following code:
apples = 5
Now, apples is a variable that stores the value 5. We can use this variable in
calculations, such as adding more apples:
apples = apples + 3
print(apples)
This will output 8, because we added 3 to the value stored in
the apples variable.
Next, let's talk about data types. A data type is an attribute that tells what
kind of data a particular variable can hold. There are several basic data types
in Python, including int, float, str, and bool.
int is short for integer, which is a whole number, positive or negative, without
decimals. For example:
num_apples = 10
num_oranges = -5
float is short for floating point number, which is a number with decimals. For
example:
price_per_apple = 0.5
price_per_orange = 0.35
Variables and Data Types:
In programming, a variable is a named location used to store data
in memory. It is called a variable because its value can vary throughout the
execution of a program. Variables must be given unique names, called
identifiers. In Python, variable names are case sensitive and cannot start with
a number. They can contain letters, numbers, and underscores.
For example, let's say we want to store the number of apples I have in a
variable named apples. We can do this with the following code:
apples = 5
Now, apples is a variable that stores the value 5. We can use this variable in
calculations, such as adding more apples:
apples = apples + 3
print(apples)
This will output 8, because we added 3 to the value stored in
the apples variable.
Next, let's talk about data types. A data type is an attribute that tells what
kind of data a particular variable can hold. There are several basic data types
in Python, including int, float, str, and bool.
int is short for integer, which is a whole number, positive or negative, without
decimals. For example:
num_apples = 10
num_oranges = -5
float is short for floating point number, which is a number with decimals. For
example:
price_per_apple = 0.5
price_per_orange = 0.35
