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Returns n characters from the left side of the supplied string x.
rvn_substrLeft(x, n)
a string to manipulate
number of characters to remove from the left side of the string
rvn_substrRight for using n characters from right side of string
rvn_substrRight
rvn_substrMRight for removing n characters from the right side of a string
rvn_substrMRight
rvn_substrLeft("hello world",3) # returns "hel"
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