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Indentation

Indentation refers to the spaces at the beginning of a code line. Like standard Python programs, MicroPython programs usually run from top to bottom: It traverses each line in turn, runs it in the interpreter, and then continues to the next line, Just like you type them line by line in the Shell. A program that just browses the instruction list line by line is not very smart, though - so MicroPython, just like Python, has its own method to control the sequence of its program execution: indentation.

You must put at least one space before print(), otherwise an error message « Invalid syntax » will appear. It is usually recommended to standardise spaces by pressing the Tab key uniformly.

if 8 > 5:
print("Eight is greater than Five!")

>>> %Run -c $EDITOR_CONTENT
Traceback (most recent call last):
  File "<stdin>", line 2
SyntaxError: invalid syntax

You must use the same number of spaces in the same block of code, or Python will give you an error.

if 8 > 5:
print("Eight is greater than Five!")
        print("Eight is greater than Five")

>>> %Run -c $EDITOR_CONTENT
Traceback (most recent call last):
  File "<stdin>", line 2
SyntaxError: invalid syntax