In Python, indentation is used for grouping statements within control structures (such as
if/else statements, loops, functions, and classes) to indicate a distinct block of code.
Indentation refers to the amount of spaces or tabs at the beginning of a line of code, which must be used consistently within the code block. Otherwise, this can lead to syntax errors.
Consider for example, the
x = 10 if x > 5: print('x is greater than 5') else: print('x is less than or equal to 5')
In this example, the two
else statements are at the same indentation level, and the statements inside the
else blocks have the same indentation level.
Similarly, for loops, the statements within the loop must have the same indentation level. For example:
for i in range(10): print(i) print('foo')
In this example, both the
In Python, the amount of indentation you add doesn't really matter, as long as it is consistent throughout the block of code. However, the recommended convention for indentation is to use four spaces per level of indentation.
Indentation errors are common in Python, and can result in syntax errors. If the indentation is not consistent, the Python interpreter will raise an
if True: // IndentationError: expected an indented block print('foo')
It's important to be careful with indentation in Python code to avoid these types of errors. To fix this error, you can simply add an indentation of one or more spaces before the
if True: print('foo')
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