R programming tutorial: R and Python differences

Python use = as assignment symbol, and R use arrow symbol as assignment symbol.
Like most of other famous programming languages, such as C++ and Java, Python has index starting from 0. However, R has index starting from 1.
Python use indentation to indicate the following statements belong to for example, for loop, function definition, etc. R use braces to enclose a block (for loop, function, etc).
In R, using arrow symbol to create a new distinct object with the same value as the old one. In Python, using = to create a new object, but both the new and old objects refer to a single object.
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