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isinf(3) -- test for infinity or not-a-number
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The isinf() function returns 1 if the number is ``infinity'', otherwise 0. The isnan() function returns 1 if the number is ``not-a-number'', otherwise 0. |
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isinff(3) -- test for infinity or not-a-number
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The isinff() function returns 1 if the number is ``infinity'', otherwise 0. The isnanf() function returns 1 if the number is ``not-a-number'', otherwise 0. |
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islower(3) -- lower-case character test
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The islower() function tests for any lower-case letter for which none of iscntrl(3), isdigit(3), ispunct(3), or isspace(3) is true. In the ``C'' locale, islower() returns true only for the character... |
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isnan(3) -- test for infinity or not-a-number
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The isinf() function returns 1 if the number is ``infinity'', otherwise 0. The isnan() function returns 1 if the number is ``not-a-number'', otherwise 0. |
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isnanf(3) -- test for infinity or not-a-number
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The isinff() function returns 1 if the number is ``infinity'', otherwise 0. The isnanf() function returns 1 if the number is ``not-a-number'', otherwise 0. |
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iso_addr(3) -- elementary network address conversion routines for Open System Interconnection
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The routine iso_addr() interprets character strings representing OSI addresses, returning binary information suitable for use in system calls. The routine iso_ntoa() takes OSI addresses and returns AS... |
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isprint(3) -- printing character test (space character inclusive)
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The isprint() function tests for any printing character including space (' '). |
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ispunct(3) -- punctuation character test
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The ispunct() function tests for any printing character except space (' ') or a character for which isalnum(3) is true. |
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isspace(3) -- white-space character test
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The isspace() function tests for the standard white-space characters for which isalnum(3) is false. The standard white-space characters are the following: ` ' Space character. \f Form feed. \n New-... |
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isupper(3) -- upper-case character test
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The isupper() function tests for any upper-case letter or any of an implementation-defined set of characters for which none of iscntrl(3), isdigit(3), ispunct(3), or isspace(3) is true. In the ``C''... |
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iswalnum(3) -- wide character classification utilities
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The functions are character classification utility functions, for use with wide characters (wchar_t or wint_t). See description for singlebyte classification functions, like isalnum(3), for details. |
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iswalpha(3) -- wide character classification utilities
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The functions are character classification utility functions, for use with wide characters (wchar_t or wint_t). See description for singlebyte classification functions, like isalnum(3), for details. |
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iswblank(3) -- wide character classification utilities
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The functions are character classification utility functions, for use with wide characters (wchar_t or wint_t). See description for singlebyte classification functions, like isalnum(3), for details. |
