1tolower(3C)              Standard C Library Functions              tolower(3C)
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NAME

6       tolower - transliterate upper-case characters to lower-case
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SYNOPSIS

9       #include <ctype.h>
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11       int tolower(int c);
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DESCRIPTION

15       The  tolower()  function has as a domain a type int, the value of which
16       is representable as an unsigned char or the value of EOF. If the  argu‐
17       ment  has  any  other value, the argument is returned unchanged. If the
18       argument of tolower() represents an upper-case letter, and there exists
19       a  corresponding lower-case letter (as defined by character type infor‐
20       mation in the program locale category LC_CTYPE),   the  result  is  the
21       corresponding  lower-case letter. All other arguments in the domain are
22       returned unchanged.
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RETURN VALUES

25       On successful completion, tolower() returns the lower-case letter  cor‐
26       responding  to  the argument passed. Otherwise, it returns the argument
27       unchanged.
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ERRORS

30       No errors are defined.
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ATTRIBUTES

33       See attributes(5) for descriptions of the following attributes:
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38       ┌─────────────────────────────┬─────────────────────────────┐
39ATTRIBUTE TYPE               ATTRIBUTE VALUE              
40       ├─────────────────────────────┼─────────────────────────────┤
41       │CSI                          │Enabled                      │
42       ├─────────────────────────────┼─────────────────────────────┤
43       │Interface Stability          │Standard                     │
44       ├─────────────────────────────┼─────────────────────────────┤
45       │MT-Level                     │MT-Safe                      │
46       └─────────────────────────────┴─────────────────────────────┘
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SEE ALSO

49       _tolower(3C), setlocale(3C), attributes(5), standards(5)
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53SunOS 5.11                        14 Aug 2002                      tolower(3C)
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