Spaces or tab used in the beginning of the code is known as indentation. Indentation is used to python to indicate which block of code a statement belongs to. You must indent each line of the block by the same amount of spaces or tabs.
Python will give you an error if you skip the indentation. The number of spaces is up to you as a programmer, but it has to be at least one. Four spaces are typical indent used in python.
Let’s go through some more examples :
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