CharAt function
The charAt String function is as follows:
charAt (String str, Integer n)
Extracts the nth character from the string. String indexes are zero-based, the first character in the string is at 0.
Parameters:
str - String to be examined n - index of character to be extracted
Returns:
The character at position n in the string.
Example:
str = "This is an example string"
c1 = charAt(str, 0)
c2 = charAt(str, 12)
// c1 is "T", c2 is "x"
c1 = charAt(str, 0)
c2 = charAt(str, 12)
// c1 is "T", c2 is "x"
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