Returns the number of characters in the given string. These procedures are the lexicographic extensions to strings of the corresponding orderings on characters. If two strings differ in length but are the same up to the length of the shorter string, the shorter string is considered to be lexicographically less than the longer string. Returns a newly allocated string whose characters form the concatenation of the given strings. Returns a newly allocated copy of the given string.
Stores char in every element of the given string and returns an unspecified value.
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