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| I |
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| | index -- locate character in string (  ) |
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| | inet -- Internet address manipulation routines ( ) |
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| | inet_addr -- Internet address manipulation routines ( ) |
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| | inet_aton -- Internet address manipulation routines ( ) |
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| | inet_lnaof -- Internet address manipulation routines ( ) |
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| | inet_makeaddr -- Internet address manipulation routines ( ) |
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| | inet_netof -- Internet address manipulation routines ( ) |
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| | inet_network -- Internet address manipulation routines ( ) |
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| | inet_ntoa -- Internet address manipulation routines ( ) |
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| | initstate -- better random number generator ( ) |
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| | intro -- introduction to functions and libraries ( ) |
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| | isalnum -- classify characters ( ) |
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| | isalpha -- classify characters ( ) |
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| | isascii -- test for ASCII character ( ) |
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| | isatty -- check if a file descriptor is associated with a terminal ( ) |
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| | iscntrl -- classify characters ( ) |
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| | isdigit -- classify characters ( ) |
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| | isgraph -- classify characters ( ) |
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| | isinf -- test for infinity or not-a-number ( ) |
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| | islower -- classify characters ( ) |
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| | isnan -- test for infinity or not-a-number ( ) |
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| | isprint -- classify characters ( ) |
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| | ispunct -- classify characters ( ) |
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| | isspace -- classify characters ( ) |
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| | isupper -- classify characters ( ) |
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| | isxdigit -- classify characters ( ) |
