Introduction:

• An IndentationError: unexpected indent occurs when Python encounters an unexpected level of indentation in your code. This typically happens when there is an extra space or tab before a line where extra indentation is not expected.

Example of IndentationError:

• Consider the following program where the body of the addition() function is not properly indented:

  python

  def addition(a, b):
    result = a + b
      return result
  
  print(addition(10, 20))
  

Output:

  File "answer.py", line 3
    return result
    ^
IndentationError: unexpected indent

• Python indicates that it encountered an unexpected indent at line 3.

Solution:

• To fix this error, ensure the statements within the function are consistently indented. Here is the corrected program:

  python

  def addition(a, b):
    result = a + b
    return result
  
  print(addition(10, 20))
  

Output: 30
The program runs without any IndentationError.

Summary:

• In this tutorial, we learned how to solve the IndentationError that occurs when there is an unexpected indentation level in the code. Proper indentation is crucial in Python to define code blocks and ensure the program runs correctly. Practice writing and indenting functions to avoid IndentationError: unexpected indent in your Python programs!