1isnum(1) General Commands Manual isnum(1)
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6 isnum - Return code telling whether the input string is numerical
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9 isnum string
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12 isnum is a utility for identifying and classifying an input string.
13 <B>isnum</B> returns an integer code depending on how it identifies the
14 input number: 0: string is not any sort of number 1: String is an inte‐
15 ger 2: String is a floating point number 3: String is a hh:mm:ss.ss
16 time 4: String is a yyyy-mm-dd date
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20 Jessica Mink, SAO (jmink@cfa.harvard.edu)
216 November 2015 WCSTools isnum(1)