Python Multiple Variables, Output Variables and Global Variables

 

Many Values to Multiple Variables in python with examples

Python is a powerful and versatile programming language that allows you to assign many values to multiple variables. This is useful when you want to assign multiple values to a single variable, or when you want to assign the same value to multiple variables. In this blog, we will take a look at how to assign many values to multiple variables in Python. First, let’s look at how to assign multiple values to a single variable. This is done using a list. A list is a collection of elements, such as integers, strings, or even other lists. To assign multiple values to a single variable, you can simply assign the list to the variable. For example, if you wanted to assign the values 1, 2, and 3 to a variable called “numbers”, you could use the following code: numbers = [1, 2, 3] Now, the variable “numbers” contains the list [1, 2, 3], and you can access each element of the list using the index. For example, to access the first element in the list, you would use “numbers[0]”.

In Python, you can assign multiple values to multiple variables in a single line. This is called "unpacking." Here's an example

x, y, z = 1, 2, 3

print(x) # Output: 1

print(y) # Output: 2

print(z) # Output: 3

You can also unpack a list or tuple into variables like this:

my_list = [1, 2, 3]

x, y, z = my_list

print(x) # Output: 1

print(y) # Output: 2

print(z) # Output: 3

 

my_tuple = (4, 5, 6)

a, b, c = my_tuple

print(a) # Output: 4

print(b) # Output: 5

print(c) # Output: 6

If you have more values than variables, you can use the "splat" operator (*) to capture the extra values in a list:

my_list = [1, 2, 3, 4, 5]

x, y, *rest = my_list

print(x) # Output: 1

print(y) # Output: 2

print(rest) # Output: [3, 4, 5]

You can also use the splat operator to unpack a list into a function call:

def my_function(x, y, *rest):

  print(x)

  print(y)

  print(rest)

 

my_function(1, 2, 3, 4, 5)

# Output:

# 1

# 2

# [3, 4, 5]

Python - Output Variables

 In Python, you can output variables using the print() function. Here's an example:

x = 10

y = 20

z = 30

print(x) # Output: 10

print(y) # Output: 20

print(z) # Output: 30

# You can also print multiple variables at once

print(x, y, z)

# Output: 10 20 30

# You can use string formatting to output variables in a string

print("x = {}, y = {}, z = {}".format(x, y, z))

# Output: x = 10, y = 20, z = 30

You can also use the f-string feature introduced in Python 3.6 to output variables in a string:

print(f"x = {x}, y = {y}, z = {z}")

# Output: x = 10, y = 20, z = 30

Python - Global Variables with examples

In Python, a global variable is a variable that is defined outside of a function and can be accessed from anywhere in the code. Here's an example:

# Define a global variable

x = 10

def my_function():

  # Access the global variable

  print(x)

my_function() # Output: 10

print(x) 

# Output: 10

You can also modify a global variable inside a function by using the global keyword:

x = 10

def my_function():

  global x

  x = 20

my_function()

print(x) # Output: 20 

However, it is generally a good idea to avoid using global variables as they can make your code difficult to understand and maintain. It is usually better to pass variables as arguments to functions or to use return values to communicate between functions.

def add(x, y):

  return x + y

def multiply(x, y):

  return x * y

def do_something(x, y):

  # Do something with the result of add() and multiply()

  result = add(x, y) * multiply(x, y)

  return result

result = do_something(2, 3)

print(result)

# Output: 10