I'm wondering if there is a way to make blocks of code independent
from each other. Please see the following example for what I mean.
x=1
## is there a way to make the following assignment not affect the above x?
## in C++, I can use {} to make the effect local. Is there an
equivalent construct in R?
x=3
<do something with the new value of x>
###
print(x) # I don't want the value of x change to 3.
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