Introduction:

• An IndentationError: expected an indented block after 'for' statement occurs when Python expects an indented block of code following a for statement, but it is missing or improperly indented. This guide will help you understand and fix this common error.

Example of IndentationError:

• Consider this program where the print statement inside the for loop is not properly indented:

  python

  for i in range(10):
  print(i)
  

Output:

  File "example.py", line 2
    print(i)
    ^
IndentationError: expected an indented block after 'for' statement on line 1

• Python clearly indicates that it expected an indented block after the for statement on line 1.

Solution:

• To fix this error, ensure the statements within the for loop are properly indented. Here is the corrected program:

  python

  for i in range(10):
      print(i)
  

Output:

0
1
2
3
4
5
6
7
8
9

• The program runs without any IndentationError.

Summary:

• In this tutorial, we learned how to solve the IndentationError that occurs when the block inside a for statement is not properly indented. Proper indentation is crucial in Python to define code blocks and ensure the program runs correctly. Practice writing and indenting for loops to avoid IndentationError: expected an indented block after 'for' statement in your Python programs!