08-26-2016
Note that some alphabetic characters are interpreted as parts of numeric values when awk converts a string to a number. The standards require that exponential notation be recognized (e.g., 1.05E-3) and allows but does not require awk to recognize hexadecimal constants of the forms 0xhexdigits and 0Xhexdigits. And, the standards allow, but do not currently require that the strings inf and infinity (case-insensitive on both) be treated as an infinity and that the string NaN (also case-insensitive) be treated as not-a-number.
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