How do you import modules and use their functions?

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Importing Modules in Python:

Modules are essential components of Python that allow you to organize and reuse code efficiently. Here's how you can import them:

1. Using the import Statement:

   • The most common way to import a module is by using the import statement.
   • Syntax: import module_name
   • Example: import math

2. Import with an Alias:

   • You can import a module with an alias (a custom name) to make it easier to work with.
   • Syntax: import module_name as alias
   • Example: import numpy as np

3. Importing Specific Functions or Objects:

   • If you only need specific functions or objects from a module, you can import them directly.
   • Syntax: from module_name import function_name
   • Example: from math import sqrt

Using Functions from Imported Modules:

Once you've imported a module, you can use its functions or objects as follows:

1. Accessing Functions:

   • To access a function from an imported module, you use the module name or alias followed by a dot and the function name.
   • Example:
     python

• • import math result = math.sqrt(16)

• Using Functions with Aliases:

  • When you import a module with an alias, use the alias instead of the module name to access its functions.
  • Example:
    python
• • import numpy as np array = np.array([1, 2, 3])

• Using Functions Imported Directly:

  • If you import specific functions directly, you can use them without referencing the module.
  • Example:
    python

3. • from math import sqrt result = sqrt(25)

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